Mboko's injury casts doubt on Serena Williams doubles match

Victoria Mboko's Wimbledon preparation has hit a snag after the Canadian suffered a knee injury during her last-16 match at the Queen's Club WTA tournament. The world number nine was forced to retire from her singles clash against Karolina Pliskova, raising concerns about her availability for the upcoming doubles quarter-final.

Mboko, 19, slipped awkwardly on the slick grass behind the baseline while attempting to change direction during her match against the powerful Czech player. Trailing 6-2, 3-4, she had a break point but fell, appearing visibly uncomfortable and emotional. After receiving attention at the net, she opted to retire from the singles match.

The injury puts her doubles partnership with tennis legend Serena Williams in doubt. The 44-year-old American great had recently returned to the sport after a nearly four-year hiatus, and the pair had successfully advanced to the quarter-finals by defeating third seeds Nicole Melichar-Martinez and Erin Routliffe. They were scheduled to face Leylah Fernandez and Laura Siegemund next.

Earlier in the day, second seed Amanda Anisimova advanced smoothly through her match, defeating Laura Siegemund, and will face Iva Jovic in the quarter-finals.