NEW YORK, Sept 9 : Karen Khachanov reached the U.S. Open semi-finals on Wednesday when Alexander Blockx retired trailing 6-2 7-5 3-2, as the Russian reached the final-four stage in Flushing Meadows for the first time since 2022.Blockx, who became the first Belgian man to reach the U.S. Open quarter-finals, wa

(Corrects headline to show it was a retirement, not a walkover)By Janina Nuno RiosNEW YORK, Sept 9 : Karen Khachanov reached the U.S. Open semi-finals on Wednesday when Alexander Blockx retired trailing 6-2 7-5 3-2, as the Russian reached the final-four stage in Flushing Meadows for the first time sin

(Corrects headline to show it was a retirement, not a walkover)By Janina Nuno RiosNEW YORK, Sept 9 : Karen Khachanov advanced to the U.S. Open semi-finals on Wednesday when Alexander Blockx retired trailing 6-2 7-5 3-2, as the Russian reached the final-four stage in Flushing Meadows for the first time