Jannik Sinner reached the quarter-finals at Wimbledon after Grigor Dimitrov was forced to retire with injury.
Dimitrov was on course to cause a major upset, leading Sinner 3-6 5-7 2-2 before retiring with a chest injury.
World number one Sinner lost his serve early on in the first set and could only create one opportunity to break back, but he failed to do so.
Dimitrov got off to a strong start in the second too, winning the first two games without dropping a point.
He had to break Sinner once more in the second to take a two-set lead, but seemed to injure his right pectoral muscle while serving in the third.
Dimitrov has now retired in each of his past five grand slam appearances, and left the court in SW19 in an emotional state.
Sinner will now face Ben Shelton in the last eight after the American overcame a slow start to knock out Lorenzo Sonego.
Shelton won 3-6 6-1 7-6 (7-1) 7-5 in just over three hours to reach his first Wimbledon quarter-finals.
Data Debrief: Young guns continue to shine
Despite a shaky performance from Sinner, he will need to switch his focus to his match against fellow youngster Shelton now.
Sinner (23 years 318 days) is the third-youngest player in the Open Era to reach the men’s singles quarter-final at seven consecutive Grand Slam events, older than only Pete Sampras and Novak Djokovic.
Meanwhile, Shelton (22 years 264 days) is the youngest American to reach the men’s singles quarter-final at Wimbledon since Andy Roddick in 2004.
