Nick Kyrgios' entertaining Wimbledon run continued as he shrugged off a shoulder injury to beat American Brandon Nakashima and reach his first major quarter-final in seven years.
The Australian was more subdued than in his fiery match against Stefanos Tsitsipas, staying largely quiet in a 4-6 6-4 7-6 (7-2) 3-6 6-2 win.
Victory came despite needing a medical timeout and regular physio treatment.
Kyrgios, 27, will play Chile's Cristian Garin in the last eight on Wednesday.
"It wasn't anywhere near my best performance level-wise but I'm super happy to get through and I fought really hard," said Kyrgios, who is ranked 40th in the world.
"I've played a lot of tennis in the past month and a half and I'm proud of the way I steadied the ship."
Unseeded Garin, 26, prevented an all-Australian encounter by fighting back from two sets down - and saving two match points in the fifth - to beat 19th seed Alex de Minaur.
The world number 43, more of a clay-court specialist, reached his first major quarter-final with a 2-6 5-7 7-6 (7-3) 6-4 7-6 (10-6) victory.
Kyrgios eyes glass of wine after demanding win
All eyes were back on Kyrgios following his explosive third-round match against Greek fourth seed Tsitsipas, which became one of the biggest talking points of this year's championships after containing so much drama.
While the match against Nakashima on Centre Court lacked the fireworks of Saturday night on Court One, it was an absorbing slow burner.
Break opportunities were rare as the pair dominated their service games, with Kyrgios' injury issue further making a match with fluctuating swings difficult to call.
While people regularly discuss his mentality when debating why a player of such talent has not won more titles, injuries are another factor in what have stalled Kyrgios' progress over recent years.
Physical problems came to the fore again for the Australian, who pulled out of the Mallorca Open last month with an abdominal injury, at the end of the first set against Nakashima.
In an even opener, neither player made an impression on the other's serve until Kyrgios, looking impaired by the problem, suddenly struggled with his returns and the American pinched the advantage.
At the start of the second set he continued to grimace and tried to loosen the affected shoulder between points.
Nevertheless he broke in the third game, helped by a double fault and shank by Nakashima, before calling for the physio at the changeover.
After taking painkillers and receiving regular treatment, he managed to move into a two-sets-to-one lead as the match progressed at a rapid pace.
Another twist came when Kyrgios lost his way in the fourth set.
Kyrgios tanked the final game as he casually returned - and even served underarm on Nakashima's first set point, which he still won - but composed himself to run away with the decider.
After securing a hard-fought win with his first match point, he said: "I need a large glass of wine tonight for sure."