Defending US Open champ Sabalenka returns to semifinals when Vondrousova withdraws with knee injury

NEW YORK (AP) — Defending champion Aryna Sabalenka returned to the U.S. Open semifinals without hitting a ball on Tuesday night because the woman she was supposed to face in the quarterfinals, 2023 Wimbledon champion Marketa Vondrousova, pulled out of their match with an injured knee. According to the U.S. Tennis Association, Vondrousova is the first woman to give her opponent a walkover — the term for when a tennis player withdraws from a match...