Victoria Mboko's singles match against Karolina Pliskova ended abruptly on Wednesday when the 19-year-old Canadian suffered a left knee injury at Queen's Club. The incident occurred as Mboko was attempting to break serve while trailing 4-3 in the second set. She immediately grabbed her knee and later told medical staff there was 'no stability right now,' leading to her retirement from the match.

Mboko and Serena Williams had won their opening doubles match on Tuesday, marking Williams' return to professional tennis after nearly four years away from competition. The 44-year-old American had previously committed to playing doubles at the Berlin Open next week, but Thursday's scheduled match at Queen's now hangs in the balance.

The injury unfolded when Mboko slipped behind the baseline during the second-set deuce point. She initially rose to her feet but required assistance from a physiotherapist before ultimately deciding she could not continue. Pliskova expressed disappointment with the manner of victory, stating she wished Mboko well and hoped the young player would recover in time for Wimbledon.

This setback represents a significant blow to Williams' doubles campaign and Mboko's promising season. The Canadian's injury timing couldn't be worse as both players looked to build momentum together, potentially ending their partnership before it truly began.