Defending champion Jannik Sinner kept his title defense on track by beating Jan-Lennard Struff 7-5, 7-6 (4), 6-3 to advance to his third Wimbledon semifinal on Tuesday.
Since trailing two sets to one to 50th-ranked Miomir Kecmanovic in the first round, the top-ranked Sinner has won 14 straight sets, giving him 10 straight-sets wins in 12 matches at the All England Club over the past two years.
Against Struff -- who at 36 was the oldest man to reach the quarterfinals at a major for the first time in the Open era -- Sinner served 16 aces, upping his total to 97 for the tournament, already his most in a single major in his career.
"First of all a very, very tough player to play against," Sinner, 24, said in his on-court interview. "He deserves everything he has done and achieved in his career. Great person off the court.