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• Alcaraz wants to play against Djokovic at '100 per cent'

  Carlos Alcaraz does not disagree with Novak Djokovic's assertion of being the best player in the world, as the Spaniard outlined his hope of facing the 22-time major winner at full fitness.

  Alcaraz has played Djokovic once before, overcoming the Serbian en route to triumphing at last year's Madrid Open.

  The teenager's success in Madrid marked his fifth tour-level title, and his second at an ATP 1000 event.

  Earlier in March, Alcaraz claimed his third ATP 1000 title with victory at the Indian Wells Open, seeing the 19-year-old leapfrog Djokovic – who has been unable to compete in the United States due to his COVID-19 vaccination status – back to the top of the world rankings.

  Djokovic claimed in interview with The National in February that he was still the best player in the world when at 100 per cent fitness.

  Alcaraz, for his part, shares that view.

  "Well, it is tough one, but, I have to play against Novak when he's at 100 per cent," Alcaraz told reporters after beating Tommy Paul at the Miami Open, where he is defending champion.

  "I would say in Madrid he played really, really well. So it was close. But I agree with him. When he's 100 per cent, probably the best player in the world.

  "What Novak has achieved, the level of Novak for example in Australia was unbelievable, really high.

  "So as I said before, I really want to play against Novak when he's 100 per cent and I'm sure I'm going to enjoy it. That's all I can say right now."

  Alcaraz remains on course for the Sunshine Double – winning both the Indian Wells Open and Miami Open in the same season.

  "I try not to think about that but it's difficult," he said. "You know, it's something that I really want. I want to be part of the few players that won the Sunshine Double.

  "So for me, would be great to achieve that, but it's something that I try not think about and try to think about day by day, match by match, and that's all. 

  "But of course it could be great to be part of that group of few players."

  Eleven players, including Djokovic – on four occasions – have won the Sunshine Double, with WTA number one Iga Swiatek the latest to achieve the feat last season.

• Second seed Tsitsipas knocked out by Khachanov, Alcaraz and Medvedev advance

  Second seed Stefanos Tsitsipas was bundled out of the Miami Open in straight sets during Tuesday's fourth round by 2022 US Open semi-finalist Karen Khachanov.

  The Russian 14th seed prevailed 7-6 (7-4) 6-4 over Tsitsipas in one hour and 34 minutes, powering 25 winners and making only nine unforced errors, compared to the Greek's 14.

  Khachanov's triumph ended a winless 0-6 head-to-head record against Tsitsipas, while it also snapped his own 23-match losing streak against top-10 opponents.

  The Russian, who also made this year's Australian Open semi-finals, has qualified for four of his six tour-level events this year.

  Khachanov will take on 25th seed Francisco Cerundolo in the quarter-finals, with the Argentinian fighting back to get past Lorenzo Sonego 3-6 6-3 6-2 in just over two hours.

  Defending champion and top seed Carlos Alcaraz had less trouble against Tommy Paul, cruising into the quarter-finals with a 6-4 6-4 victory.

  Alcaraz won the winners' count 24-9, setting up a quarter-final clash with ninth seed Taylor Fritz, as the Spanish 19-year-old chases a rare Sunshine Double, having won last week's Indian Wells Open.

  Fritz progressed after getting past seventh seed Holger Rune 6-3 6-4 in 86 minutes, sending down eight aces and 22 winners for the match.

  Fourth seed Daniil Medvedev played late into the evening after a lengthy rain delay in Miami, but made light work of Quinten Halys 6-4 6-2, triumphing just past 1:30am local time.

  Medvedev, who is into his third straight Miami quarter-final, will face American qualifier Christopher Eubanks in the last eight after he got past Frenchman Adrian Mannarino 7-6 (7-2) 7-6 (7-5) in another rain-delayed contest.

  Italian 10th seed Jannik Sinner knocked off sixth seed Andrey Rublev 6-2 6-4, advancing to face Emil Ruusuvuori after he beat Botic van de Zandschulp 4-6 6-4 7-5.

• Rybakina wins 12th straight to reach Miami Open semi-finals, Pegula beats Potapova

  Elena Rybakina is now two wins away from completing the rare 'Sunshine Double' after defeating Martina Trevisan 6-3 6-0 to reach the Miami Open semi-finals on Tuesday.

  Only four women have ever claimed the Sunshine Double – which requires winning both the Indian Wells Open and Miami Open. Steffi Graf did it in both 1994 and 1996, Kim Clijsters did it in 2005, Victoria Azarenka accomplished the feat in 2016 and current world number one Iga Swiatek did it just 12 months ago.

  Rybakina knocked off Swiatek and world number two Aryna Sabalenka in consecutive matches en route to the Indian Wells title, and she has now extended her winning streak to 12 with Tuesday's victory. Against Trevisan, Rybakina served another 10 aces compared to zero from the Italian.

  In her fourth-round match the Kazakhstan representative became the first WTA player this season to post three consecutive matches with at least 10 aces, and with another she became the first woman since Serena Williams at the 2020 US Open to do so in four consecutive matches at the same tournament.

  She needed just 27 minutes to race through the second set, and in the process she booked a semi-final against third seed Jessica Pegula.

  America's top hope, Pegula had to come from behind against Russia's Anastasia Potapova in the 4-6 6-3 7-6 (7-2) result, saving two match points in the deciding set to force the pivotal tiebreaker.

  The match was delayed for hours due to persistent rain, and the contest lasted two hours and 38 minutes, meaning they did not finish up on court until nearly 1:30am local time.

  While consistently making it deep into major tournaments, Pegula only has two WTA singles titles to her name, and only once since the end of 2019. 

  With one more win she can book her spot in the final, and a chance to claim her second WTA 1000 crown after breaking through at the 2022 Guadalajara Open.