Four-time Australian Open winner Roger Federer reaches last 16 . Federer, who has won the past two grand slams, will face world No. 1 Wimbledon champ Andy Murray sees off Feliciano Lopez to join them in fourth round . `` We left it all here last year , '' said Azarenka , when asked if she had spoken to Stephens about the incident . Maria Sharapova , Sloane Stephens and Victoria Azarenka through in women 's draw .
Four-time Australian Open winner Roger Federer reaches last 16 . Federer, who has won the past two grand slams, will face world No. 1 Wimbledon champ Andy Murray sees off Feliciano Lopez to join them in fourth round . Maria Sharapova , Sloane Stephens and Victoria Azarenka through in women 's draw .