Djokovic and Azarenka both continue winning runs at American Wells . World No . 1 It was all of his unforced errors , so I just needed to hang in there and try to be patient . Djokovic wins 15th straight match against Bulgaria 's Grigor Dimitrov . Azarenka 's winning streak now stands at 17 after victory over Urszula Radwanska . John Isner will replace Azarenka as the top-ranked American male tennis player .
Djokovic and Azarenka both continue winning runs at American Wells . World No . 1 Djokovic wins 15th straight match against Bulgaria 's Grigor Dimitrov . Azarenka 's winning streak now stands at 17 after victory over Urszula Radwanska . John Isner will replace Azarenka as the top-ranked American male tennis player .