Leading 4-1 in the third set, Denis Shapovalov retired against Karen Khachanov after a medical timeout for his right thigh, following signs from his box. Denis Shapovalov retired from his first-round match against Karen Khachanov at the Rolex Paris Masters on Monday night, even though he was leading 4-1 in the third set. The Canadian had lost the first set 4-6 and won the second in a tie-break.