Novak Djokovic to play Andy Murray in the quarterfinals at Miami Masters . Roger Federer and Novak Djokovic also through to the last eight . Australian Open champion Serena Williams crashes out . Women 's No . 16 Rafael Nadal sets up semifinal clash with Germany .
Novak Djokovic to play Andy Murray in the quarterfinals at Miami Masters . Roger Federer and Rafael Nadal also through to the last eight . Australian Open champion Stanislas Wawrinka crashes out . Women 's No . 1 Serena Williams sets up semifinal clash with Maria Sharapova .