Serena Williams’ return ends prematurely at Queen’s Club due to Mboko injury

Mboko forced out with knee injury after heavy fallWilliams’ focus now shifts to Berlin wildcard spotSerena Williams’s first tournament since coming out of retirement has ended prematurely after her partner Victoria Mboko was forced to withdraw from the Queen’s Club tournament after injuring her knee when slipping on the grass in her singles match on Wednesday.Williams made a sensational return to competition at 44 after a four-year absence on Tuesday alongside Mboko as the pair defeated the thir...