Khachanov Advances as Blockx Retires | Pro Tennis News

Karen Khachanov storms into the US Open semifinals after his opponent, Alexander Blockx, retires due to a debilitating rib injury — a heartbreaking end to Blockx’s historic run, which included his best Grand Slam showing and a first-ever quarterfinal appearance at the US Open. Down 6-2, 7-5, 3-2, Blockx, seeded 28th and battling through pain since the round of 16, couldn’t continue despite medical timeouts for both foot and torso issues. Khachanov, ranked 51st and 30 years old, now eyes a showdown with either Zverev or Van De Zandschulp — his second US Open semifinal and third Grand Slam semifinal overall. While Kh...