Novak Djokovic rallied from a set and a break down Tuesday to beat Alexandr Dolgopolov 6-7 , 7-5 , 6-0 in the fourth round of the Miami Open . Dolgopolov led 4-1 in the second set before the world No 1 mounted a comeback to remain in contention for his fifth Key Biscayne title . After the second set , Dolgopolov received treatment from a trainer , who bandaged the soles of both feet . Novak Djokovic came back from a set down to reach the quarter-finals of the Miami Open on Tuesday . Alexandr Dolgopolov had both of his soles bandaged and won only three points in the final set . The Russian moved poorly after that and won only three of 27 points in the final set . As Djokovic fell behind in the first set , he busted a racket in anger , drew jeers from the crowd and was cited for two code violations , which cost him a point penalty . However , he won a succession of long exchanges late in the second set that allowed him to even the match . Djokovic claimed a succession of long exchanges in the second set to even the match and go on to win .
Novak Djokovic came from a set down to beat Alexandr . The world No 1 remains in contention for his fifth Miami Open win . Dolgopolov became less mobile after receiving treatment to his feet .