Novak Djokovic to play Andy Murray in the quarterfinals at Miami Masters . ` I felt much better today than in a few of my other matches here , '' said defending champion Williams , who has won a record six Miami titles . Roger Federer and Rafael Nadal also through to the last eight . The other quarterfinal matches are set for Sunday with a first round match between world number one David Ferrer of Spain against Juan Martin Del Potro of Argentina on Court Philippe Chatrier. Women 's No . 1 Serena Williams sets up semifinal clash with Maria Sharapova .
Novak Djokovic to play Andy Murray in the quarterfinals at Miami Masters . Roger Federer and Rafael Nadal also through to the last eight . The other quarterfinal matches are set for Sunday with a first round match between world number one David Ferrer of Spain against Juan Martin Del Potro of Argentina on Court Philippe Chatrier. Women 's No . 1 Serena Williams sets up semifinal clash with Maria Sharapova .