Amanda Anisimova advanced to the fourth round of the French Open on Friday after Czech Karolina Muchova was forced to retire due to an ankle injury she suffered during the match. The 25-year-old Muchova, a former world number 19, reached the Australian Open semi-finals in 2021 and is also a two-time quarter-finalist at Wimbledon but the Czech's last 12 months have been hampered by injuries. Muchova, who ousted title-contender and Greek fourth seed Maria Sakkari in her previous match, got her left thigh taped during a medical timeout off the court after winning the opening set by overturning a 5-1 deficit in the tiebreaker.