Serena to resume comeback alongside sister Venus in Cincinnati

Serena and Venus Williams are set to play at the Cincinnati Open after being awarded a wild card for the women's doubles draw.

Serena made a sensational return to tennis during the grass-court season after almost four years out of the professional game, but the 44-year-old suffered a knee injury during a first-round singles loss which led to her and Venus withdrawing from the doubles at the All England Club.