And unfortunately I did n't have enough time to recover to be able to play the semifinals today . '' Hopman Cup battling to be fit for Serbian Open after having minor surgery on toe . World No . 1 pulls out of Friday 's semifinal against Williams at Brisbane warmup event . U.S. Open champion Victoria Azarenka will play Russia 's Anastasia Pavlyuchenkova in final . Andy Murary into semis of men 's event , while Novak Djokovic will play in final of Serena Williams .
Hopman Cup battling to be fit for Serbian Open after having minor surgery on toe . World No . 1 pulls out of Friday 's semifinal against Williams at Brisbane warmup event . U.S. Open champion Victoria Azarenka will play Russia 's Anastasia Pavlyuchenkova in final . Andy Murary into semis of men 's event , while Novak Djokovic will play in final of Serena Williams .