Stefanos Tsitsipas advanced to the Western & Southern Open semi-finals on Wednesday evening when his opponent, Reilly Opelka, retired leading 6-5 in the first set due to a right knee injury.
Tsitsipas had never previously won a match at the Western & Southern Open, but he has now moved past a trio of tall opponents — 6’8” Kevin Anderson, 6’10” John Isner and 6’11” Opelka — at the USTA Billie Jean King National Tennis Center.
“The question remains: Am I going to make it to the record books for playing the tallest players on the ATP consecutively, one after the other?” Tsitsipas asked Tuesday evening, cracking a laugh.
“I have to check it out. I don’t think it has ever happened before.”
Opelka took a medical timeout at the 4-3 changeover to have his right knee taped. The American tried to battle on, saving two break points at 5-5 and holding that service game. But Opelka, a first-time Masters 1000 quarter-finalist, could not continue.
Tsitsipas will face former World No. 3 Milos Raonic or Serbian Filip Krajinovic for a spot in the final.
Raonic beat the reigning Nitto ATP Finals champion in straight sets at this year’s Australian Open, but Tsitsipas owns a 2-0 ATP Head2Head series lead against Krajinovic.
The fourth seed is pursuing his first Masters 1000 title, having lost in the championship match at 2018 Canada and last year’s Mutua Madrid Open.