Stefanos Tsitsipas and Nick Kyrgios will meet in a blockbuster Citi Open semi-final after straight-sets wins on Friday.

Tsitsipas, the top seed at the ATP 500 event, ran away with a 7-5 6-0 victory over Frenchman Benoit Paire in their quarter-final.

The Greek star is into his seventh semi-final of the year and is set to rise into the world's top five after his run in Washington.

Tsitsipas' win over Paire was not without some controversy, with the 10th seed unhappy with the 20-year-old needing to change shoes early in the second set.

In what shapes as an entertaining last-four clash, Tsitsipas will face Kyrgios, with the pair having played doubles together in Washington.

Kyrgios' fine run continued with an impressive 6-3 6-3 victory over lucky loser Norbert Gombos.

In the other semi-final, Daniil Medvedev will take on Peter Gojowczyk.

Russian third seed Medvedev got past sixth seed Marin Cilic 6-4 7-6 (9-7) and lucky loser Gojowczyk upset Kyle Edmund 6-3 4-6 6-3.

In the doubles, brothers Andy and Jamie Murray bowed out in the quarter-finals.

Dominic Thiem's bid for a first Generali Open title continued with a semi-final victory on Friday, but the tricky Albert Ramos-Vinolas lies ahead.

World number four Thiem is chasing a breakthrough victory in home territory and proved too strong for Lorenzo Sonego, the only other seeded player in the last four, as he won 6-3 7-6 (8-6).

The Austrian stayed patient in the opener before piling on the pressure after holding for 4-3, taking the second break point of the match.

Sonego broke to lead 2-0 in the second set but could not hold on and bowed to Thiem in a tie-break.

Victory against Ramos-Vinolas is no foregone conclusion, though, with the Spaniard flying high heading into the weekend.

Ramos-Vinolas triumphed in Gstaad last week, knocking out three seeded compatriots along the way, and his semi-final triumph in Kitzbuhel on Friday made it nine consecutive ATP Tour victories.

The 31-year-old was too strong for Casper Ruud despite trailing 5-2 in the opening set, recovering to advance 7-5 6-4.

"I changed my tactics, I stepped in a little bit more," Ramos-Vinolas said. "With the forehand, I changed a little more down the line, also with the return, a little bit closer to the lines."

Fabio Fognini's Los Cabos Open title defence came to an end with a loss to the in-form Taylor Fritz, while Guido Pella and Diego Schwartzman set up a semi-final showdown.

Fognini, last year's champion in Mexico, bowed out in the quarter-finals with a 6-1 7-6 (7-1) defeat to Fritz on Thursday.

Fritz is coming off a run to the Atlanta Open final and got the better of Fognini to record his 12th victory in his last 14 matches.

The 21-year-old American saved five break points against Italian top seed Fognini, who had won their only previous meeting last year.

Fritz will face Radu Albot in the semi-finals after the Moldovan seventh seed beat 2017 runner-up Thanasi Kokkinakis 6-3 6-3.

Pella, the second seed, edged past qualifier Kwon Soon-woo 4-6 6-1 6-2, breaking serve six times.

He will meet Schwartzman in an all-Argentinian last-four clash after the third seed crushed Mikhail Kukushkin 6-1 6-2.

Pella and Schwartzman were the second seeds in the doubles at the tournament, but lost in the quarter-finals on Thursday.

Stefanos Tsitsipas advanced to the Citi Open quarter-finals and the in-form top seed was joined by Marin Cilic and Daniil Medvedev.

Tsitsipas was too good for Australian Jordan Thompson, prevailing 6-3 7-6 (7-4) to book a spot in the last eight on Thursday.

Greek star Tsitsipas saved a set point in the second set as he earned a clash with 10th seed Benoit Paire in Washington.

"It's very pleasing knowing that I can be mature and handle those situations very bravely, so I'm really happy with that," said Tsitsipas.

"I showed character out there. I played heroic tennis, I would say, in those crucial moments. That was very nice to see."

Paire – who fired down 12 aces and did not drop serve – defeated fifth seed John Isner 7-6 (7-3) 6-3 at the ATP 500 tournament.

Former US Open champion Cilic beat ninth seed Felix Auger-Aliassime 6-3 6-4 to reach the Washington quarters.

Auger-Aliassime's 11th double fault of the match allowed sixth seed Cilic to move through, with Medvedev waiting in the next round.

Medvedev – the third seed – saw off local favourite Frances Tiafoe 6-2 7-5.

Elsewhere, eighth seed Milos Raonic was stunned 6-4 6-4 by Peter Gojowczyk, Kyle Edmund rallied past Jo-Wilfried Tsonga 4-6 6-3 6-4, Norbert Gombos trumped Miomir Kecmanovic 1-6 6-3 7-6 (7-4) and Nick Kyrgios was a 6-2 7-5 victor against Yoshihito Nishioka.

Dominic Thiem edged towards a maiden Generali Open title as the world number four progressed into the semi-finals by beating Pablo Andujar.

The top seed is aiming to win his home tournament for the first time and, although his match with Andujar lasted close to two hours, Thiem came out on top 7-6 (7-4) 6-4 on Thursday.

Thiem, a beaten finalist at Roland Garros earlier this year but a winner in Barcelona and at Indian Wells, excelled on the second serve and broke four times to overcome the Spaniard.

Lorenzo Sonego, who beat third seed Fernando Verdasco 6-4 6-4, awaits Thiem in the final four.

Joining Thiem and Sonego is 20-year-old Norwegian Casper Ruud, who continued his fine run with an impressive 6-3 7-6 (7-4) victory over Pablo Cuevas to reach his third ATP Tour semi-final of 2019.

Jeremy Chardy beat second seed Dusan Lajovic in the round of 16, but the Frenchman could not follow that win up against Albert Ramos-Vinolas, who triumphed 6-3 6-4 to set up a semi against Ruud.

Defending champion Fabio Fognini moved through to the Los Cabos Open quarter-finals, while Thanasi Kokkinakis ousted Lucas Pouille.

Top seed Fognini kept his title defence on track with a 4-6 6-3 6-4 victory over Marcel Granollers at the ATP 250 tournament on Wednesday.

Fognini dropped the opening set, but the Italian rallied to set up a clash with fifth seed Taylor Fritz, who outlasted Prajnesh Gunneswaran 4-6 6-3 6-2.

There were contrasting results for seeds Pouille and Guido Pella on the Mexican hard courts midweek.

Pouille – the French fourth seed – was sent packing by Kokkinakis, who backed up his drought-breaking victory with a 2-6 6-4 6-3 triumph.

Prior to this tournament, Kokkinakis had not claimed a tour-level win since stunning Roger Federer in March 2018 and he will now face Radu Albot after the seventh seed defeated Taro Daniel 6-1 6-2.

Second seed Pella, meanwhile, saw off Grigor Dimitrov 6-4 6-2 to seal his eighth quarter-final berth of the year.

Next up for Pella is South Korean qualifier Kwon Soon-woo, who trumped Juan Ignacio Londero 6-4 3-6 6-3 for his first ATP Tour quarter-final.

Third seed Diego Schwartzman topped Ernests Gulbis 7-5 6-0 and Mikhail Kukushkin claimed a 7-5 7-5 win over Cameron Norrie.

Stefanos Tsitsipas and Nick Kyrgios moved into the Citi Open third round thanks to straight-sets wins on Wednesday.

Tsitsipas, the top seed, brushed past wildcard Tommy Paul 6-3 7-5 in their second-round clash in Washington.

The Greek star converted three of his eight break points to set up a last-16 meeting with Australian Jordan Thompson.

Thompson produced one of the upsets of the day, beating 14th seed Jan-Lennard Struff 6-7 (8-10) 6-4 7-5.

Kyrgios' run also continued, the Australian serving 24 aces in a 6-4 7-6 (7-5) victory over French 11th seed Gilles Simon.

Next up for Kyrgios is Yoshihito Nishioka, who edged seventh seed David Goffin 6-7 (5-7) 6-2 7-6 (7-5) after two hours, 40 minutes.

Of the 10 seeds in action, Simon, Goffin and Struff were three of five to make exits.

Pierre-Hugues Herbert was edged by Miomir Kecmanovic 3-6 6-4 7-6 (7-5) and Atlanta champion and last year's runner-up Alex de Minaur went down to lucky loser Peter Gojowczyk 6-3 7-6 (8-6).

Three-time runner-up John Isner cruised past Hubert Hurkacz 6-4 6-4, 2014 champion Milos Raonic beat Tim Smyczek 6-1 6-4 and Felix Auger-Aliassime edged Reilly Opelka 6-4 3-6 6-4.

Benoit Paire survived against Marc Polmans with a 6-3 6-7 (5-7) 7-6 (7-5) win and lucky loser Norbert Gombos overcame Adrian Mannarino 6-4 7-6 (11-9).

Meanwhile, in doubles action, brothers Andy and Jamie Murray got through their opener by beating Nicolas Mahut and Edouard Roger-Vasselin.

Dominic Thiem had little trouble progressing into the quarter-finals of the Generali Open but second seed Dusan Lajovic bowed out on Wednesday.

With the top two seeds handed byes into the second round, French Open finalist Thiem made light work of wildcard Sebastian Ofner 6-3 6-2.

World number 26 Lajovic had no such luck against Jeremy Chardy, however, with the Frenchman coming out on top 3-6 6-4 6-3.

Chardy won 82 per cent of points behind his first serve and came from a break down in the third set to triumph.

Third seed Fernando Verdasco, who will face Lorenzo Sonego in the last eight, beat Jozef Kovalik 6-4 7-6 (9-7), while Pablo Cuevas surrendered the first set but rallied to overcome wildcard Dennis Novak.

Youngster Casper Ruud followed up an impressive performance against Pablo Carreno Busta on Tuesday with a straight-sets triumph over Matthias Bachinger.

Going up against Thiem in the quarters will be Pablo Andujar, who bettered Kitzbuhel resident and two-time champion Philipp Kohlschreiber 6-4 6-4.

Albert Ramos-Vinolas eased past compatriot Jaume Munar in Wednesday's other match.

Grigor Dimitrov battled to a hard-fought win in the Los Cabos Open first round, while Taylor Fritz was untroubled on Tuesday.

Dimitrov, who has fallen out of the world's top 50 after a tough first half of the year, got past Steve Johnson 7-6 (7-4) 4-6 7-6 (7-5) at the ATP 250 tournament.

The Bulgarian served 12 double faults but still managed to edge through for his first victory since the French Open.

Fritz, coming off a run to the final in Atlanta, disposed of German Dominik Koepfer 6-3 6-4 in just an hour.

The American fifth seed managed to break once in each set in what was a routine outing.

Radu Albot, the seventh seed, also managed to get through courtesy of a 7-5 2-6 6-0 win over Janko Tipsarevic.

The only seed to depart was Cristian Garin, who went down to Juan Ignacio Londero 3-6 6-2 6-3.

Tennys Sandgren was thrashed 6-2 6-0 by Taro Daniel, Cameron Norrie got past Gregoire Barrere 7-6 (7-5) 6-0 and qualifier Kwon Soon-woo easily beat Cedrik-Marcel Stebe 6-2 6-1.

Marin Cilic claimed a much-needed win in the Citi Open second round, while Jo-Wilfried Tsonga caused an upset on Tuesday.

Cilic, yet to hit top form this year, battled past Marius Copil 7-6 (7-4) 7-6 (7-4) to reach the last 16 at the ATP 500 event in Washington.

The Croatian sixth seed and 2014 US Open champion improved to just a 12-10 win-loss record this year thanks to the hard-fought victory.

The only seed to fall on Tuesday was Karen Khachanov, who went down to Tsonga.

Tsonga served 13 aces in a 6-4 2-6 7-5 victory over Khachanov, the second seed losing to the Frenchman for the third time in as many meetings.

Daniil Medvedev, Kyle Edmund and Frances Tiafoe joined Cilic and Tsonga in the third round.

Medvedev eased past wildcard Bjorn Fratangelo 6-3 6-4, Edmund crushed Lloyd Harris 6-1 6-4 and Tiafoe was too good for Alexander Bublik 6-1 7-6 (7-5).

Meanwhile, Jack Sock's wait for a first singles win of the year continues after losing 7-5 6-3 to Jordan Thompson in the first round.

Nick Kyrgios sent down 15 aces on his way to a 7-5 6-4 win over qualifier Thai-Son Kwiatkowski, Reilly Opelka edged Christopher Eubanks 6-4 7-6 (7-3) and Yoshihito Nishioka was untroubled by Dan Evans in a 6-4 6-1 victory.

Peter Gojowczyk and Miomir Kecmanovic also advanced after wins over Andrey Rublev and Alexei Popyrin respectively.

Andy Murray could return to singles action at the Cincinnati Masters next month with a view to featuring at the US Open.

The former world number one has not played a singles match since a first-round loss to Roberto Bautista Agut at the Australian Open in January, with Murray undergoing resurfacing surgery on his right hip shortly afterwards.

He made his comeback in the doubles alongside Feliciano Lopez at the Queen's Club Championships - the pair winning the competition - and Murray has played in two more tournaments since while also linking up with Serena Williams in the mixed doubles at Wimbledon.

Murray will partner his brother Jamie at the Citi Open in Washington this week and he admitted he is close to a singles comeback too.

"In terms of how I'm moving and feeling and pulling up the next day from these practices, I'm really happy with where I'm at. I think I'm quite close," the three-time grand slam champion said in quotes published on the ATP Tour's website.

"If I was to play a tournament in a few weeks' time, I could do it. But it's just to get to maybe where I want to get to, I'll need to play matches and get a little bit more work done in the gym on my cardio."

The singles tournament in Cincinnati begins on August 11, 15 days before the US Open starts, and Murray admits he would need to participate in the former to be involved at Flushing Meadows.

"Best-case scenario probably would be Cincinnati, and then if I wasn't able to play in Cincinnati, there's a good chance I would probably wait until after New York because I wouldn't want my first tournament to be playing best-of-five [sets]," he explained.

Between the Citi Open and Cincinnati Masters, Murray will be reunited with Lopez at the Rogers Cup in Montreal.

Frenchman Jo-Wilfried Tsonga celebrated his first victory at the ATP Citi Open after defeating Brayden Schnur en route to the second round.

Tsonga – the 2008 Australian Open runner-up – topped Canadian Schnur 6-4 7-6 (7-2) in Washington on Monday.

It meant Tsonga achieved a career first, having never won at the ATP 500 event in his 16-year career, with his only other Citi Open match resulting in defeat in 2009.

Tsonga, who improved to 22-12 for the year, will face second seed Karen Khachanov for a place in the third round.

Tommy Paul beat Denis Kudla 6-0 6-4 to set up a second-round clash with top seed Stefanos Tsitsipas, who was busy on Monday.

Tsitsipas and Australian star Nick Kyrgios teamed up on the doubles court for the first time, but they lost to top seeds Juan Sebastian Cabal and Robert Farah 6-3 3-6 10-5.

Elsewhere in the singles, 2016 finalist Ivo Karlovic was beaten by wildcard Bjorn Fratangelo 6-4 6-7 (14-16) 7-6 (7-5), Adrian Mannarino topped Ilya Ivashka 7-6 (7-3) 6-3 and Tim Smyczek was a 6-4 6-4 winner over Matthew Ebden.

Alexander Bublik claimed a 7-6 (7-5) 6-3 victory against Bradley Klahn, Malek Jaziri lost 6-2 6-4 to Marc Polmans, Hubert Hurkacz was too good for Donald Young 6-1 6-4, Lloyd Harris outlasted Ricardas Berankis 4-6 6-3 6-1, while Marius Copil triumphed 6-1 5-7 6-3 over Mikael Torpegaard.

At the Los Cabos Open, Thanasi Kokkinakis secured his first tour-level win since the 2018 Miami Open in March with a 6-4 6-4 victory against Maxime Janvier.

Marcel Granollers, Ernests Gulbis, Mikhail Kukushkin and Prajnesh Gunneswaran also advanced at the ATP 250 event in Los Cabos, Mexico.

Martin Klizan's title defence failed to clear the first hurdle as he lost his first-round Generali Open clash in Austria on Monday.

Klizan's sixth and most recent ATP Tour triumph saw him beat Denis Istomin in the 2018 final but, 12 months on, a match of three tie-breaks saw him denied by qualifier Matthias Bachinger.

The Slovakian broke in the opening game of the match and led again later in the first set but saw Bachinger respond.

Klizan won the second and held off a match point in the third yet came up short in another tie-break, falling to an agonising 7-6 (7-5) 6-7 (5-7) 7-6 (7-4) defeat.

There were three sets and three tie-breaks, too, as Lorenzo Sonego - the only seeded player involved on Monday - defeated Federico Delbonis.

Sonego needed three hours and 36 minutes but got the job done in a marathon contest, setting up a clash with Roberto Carballes Baena, who came from behind to defeat Hugo Dellien.

Jeremy Chardy came through an incredible back-and-forth against Marco Cecchinato, sharing nine converted break points across two sets, while Dennis Novak beat fellow wildcard Jurij Rodionov.

Alex de Minaur earned his second ATP Tour title of 2019 by beating Taylor Fritz in the Atlanta Open final.

Australian third seed De Minaur claimed the Atlanta trophy with a 6-3 7-6 (7-2) win in Georgia on Sunday.

After winning January's Sydney International, De Minaur was too good for second seed Fritz as he celebrated his second career triumph.

De Minaur was flawless on serve, dropping just 10 points en route to a straight-sets victory after one hour, 17 minutes.

The 20-year-old also did not face a break point throughout against American Fritz, who was denied his second title of the year.

Albert Ramos-Vinolas ended a three-year title drought with an emphatic defeat of Cedrik-Marcel Stebe in the Swiss Open Gstaad final.

The Spaniard had failed to add to his solitary ATP Tour triumph at Bastad in 2016 before beating Stebe 6-3 6-2 on Sunday after a long delay due to rain.

Ramos-Vinolas did not drop a set in the tournament and proved to be too canny for the 455-ranked German, who won twice on Saturday to reach his first ATP Tour final.

The world number 85 broke twice in each set after failing to hold in the first game to finally get his hands on another trophy.

Outsider Stebe said: "The conditions were tough today. Albert was rock solid as he was all week. He deserves to win.

"It was an amazing week for me here in Gstaad, I played very good tennis. Of course, it wasn't easy to play two matches yesterday. I gave everything today, but it wasn't enough. That's tennis."

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