Victoria Mboko retired from her singles match at Queen's Club after suffering a severe left knee injury against Karolina Pliskova.The withdrawal jeopardizes the doubles campaign she shares with Serena Williams, who recently returned to professional tennis after a four-year absence.Official medical updates are pending to determine if the pair can participate in their upcoming quarterfinal match on Thursday.Williams remains scheduled to play in the
Berlin Open next week despite the current uncertainty surrounding her partner.