Novak has to play Andy Murray in the quarterfinals at Miami Masters . Roger Federer and Rafael Nadal also through to the last eight . I have n't been able to do in the past against her , but it 's great Australian Open champion Stanislas Wawrinka crashes out . Women 's No . 1 Serena Williams sets up semifinal match with Maria Sanchez .
Novak has 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 match with Maria Sanchez .