Carlos Alcaraz continued his defence of the Wimbledon crown with a hard-fought win over Ugo Humbert in the last 16, picking out his "unbelievable" set point in the second set as the highlight.
Alcaraz withstood a late push from Humbert to win 6-3 6-4 1-6 7-5 and book his place in the last eight, where he will play Tommy Paul or Roberto Bautista Agut.
He was made to work for his two-set advantage on Centre Court, saving four break points in the fifth game of the second then breaking Humbert's resistance.
He showed remarkable athleticism on set point, recovering from a fall to sprint back to mid-court and tee up Humbert for a missed volley.
Alcaraz later found a second wind in the fourth set, smashing 17 winners to Humbert's 10 to get over the line.
Asked how he would describe his efforts on that earlier set point, Alcaraz said: "Unbelievable, I guess! I just try to fight for every ball.
"It doesn't matter which part of the court I am at, I just try to run to whichever part of the court I am on, giving myself the chance to stay alive in the point.
"Set point was a really important point for me so I had to show the opponent that whatever shot he hits, I will be there.
"That's me, I will be there, fighting until the last ball and sometimes it is a good point like this one and sometimes I lose it, but the main thing is just to fight."
Data Debrief: Alcaraz continues grand slam love story
Alcaraz's triumph saw him reach a ninth men's singles quarter-final from 14 grand slam draws entered - the most of any player who began their career in the Open Era through their first 14 participations.
The Spaniard also maintained his winning streak at grand slams, having now won 11 matches in a row following his French Open triumph last month.
But there will be room for improvement for Alcaraz, who uncharacteristically served six double faults throughout the contest, compared to Hubert's one.
Djokovic to monitor Mensik after fighting back in Shanghai thriller
Novak Djokovic said Jakub Mensik was one to watch after being forced to fight from a set down to beat the teenager in a dramatic Shanghai Masters quarter-final on Friday.
Djokovic prevailed 6-7 (4-7) 6-1 6-4 in two hours and 19 minutes to maintain his quest for a 100th ATP Tour-level title, advancing to a record 77th semi-final at Masters 1000 events.
Though he lost control in the second set, Mensik advanced his reputation as an elite server by registering 17 aces to Djokovic's seven throughout the course of the contest, with seven of those arriving in the opening set.
The Czech, ranked 65th, had defeated world number six Andrey Rublev and number nine Grigor Dimitrov en route to the last eight, and Djokovic was impressed by the fight he put up.
"We went toe-to-toe until the last moment," Djokovic said. "I was fortunate to find great serves in the last game, a couple of aces, that helps.
"I didn't serve that well at the end of the first set when I was serving for it. He managed to turn things around by playing a good tie-break."
Asked about Mensik's potential, Djokovic said: "I could see today why he is one of the best servers we have in the game.
"He is only 19, the future is very bright for him. He knows that I am always there for him, whatever he needs.
"Jakub is somebody that I have been following for the last three or four years, ever since he played the junior finals of the Australian Open.
"We like playing each other, we raise the level when we face each other. We've played a lot of practice sets and it's always fun."
Djokovic will now face Taylor Fritz in the semi-finals on Saturday, with a spot in Sunday's final – against Jannik Sinner or Tomas Machac – on the line.
Zheng to face Wang in first all-Chinese WTA 1000 semi-final in Wuhan
World number seven Zheng Qinwen will face Wang Xinyu in the first all-Chinese semi-final at a WTA 1000 event on Saturday, following the duo's quarter-final victories on Friday.
Zheng overcame Wimbledon and French Open runner-up Jasmine Paolini 6-2 3-6 6-3 in the last eight of the Wuhan Open, teasing several errors out of the Italian in the deciding set of a big-hitting encounter.
She has now won more matches since the end of Wimbledon (23) than any other player on the WTA Tour, and her next opponent will be compatriot Wang.
Wang came through a gruelling encounter with Ekaterina Alexandrova earlier on Friday, saving two match points en route to a 4-6 6-4 7-6 (8-6) victory.
Making her first WTA 1000 semi-final, the world number 51 is the second-lowest ranked player to ever reach that stage in Wuhan.
The winner of Saturday's tie will take on either Aryna Sabalenka or Coco Gauff in the final, with both players bidding to become the first Chinese player to go all the way at the tournament.
Data Debrief: Rare home contest in the offing
Since the inception of WTA 1000 events in 2009, only two local pairs have met in a semi-final match in the format, ahead of Zheng and Wang becoming the third this weekend.
Serena and Venus Williams faced off in Miami in 2009, while Madison Keys and Sofia Kenin battled it out in the final four of the 2019 Cincinnati Open.
Djokovic survives Mensik scare to reach Shanghai semi-final
Novak Djokovic continued on his quest for a 100th ATP Tour level title by edging out Jakub Mensik in a thrilling quarter-final encounter at the Shanghai Masters.
Djokovic had to come from a set down to claim the triumph, eventually prevailing 6-7 (4-7) 6-1 6-4 in two hours and 19 minutes against his Czech opponent.
The pair settled into the contest quickly, trading blows throughout as Mensik served up seven of his 17 aces in the first set, with a tie-break deciding who would go in front.
Despite taking a three-point lead, Djokovic found himself behind heading into the second set after a valiant comeback from the 19-year-old.
But the Serbian responded emphatically, finding a break of serve in the second game before hammering home his advantage, taking the encounter the distance.
Djokovic was again able to find an early break in the decider, with Mensik able to prolong the inevitable in the ninth game having squandered three opportunities for game point.
However, the world number four sealed the win in style, serving up a love game to set up a tie with Taylor Fritz in the final four after the American's win over David Goffin.
Data Debrief: Djokovic closing in on landmark victory
One of only three to reach 50 or more semi-finals along with Rafael Nadal and Roger Federer, Djokovic has now reached his 78th ATP Masters 1000 semi-final - the most of any player since the format’s inception in 1990.
Including the Beijing Olympics, Djokovic remains undefeated in China against opponents ranked outside the ATP's top 20, moving to a record of 42-0 with his victory over Mensik.
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