Rafael Nadal into quarterfinals of Australian Open . Federer wins first title since Wimbledon final in Melbourne last year. Nick Krygios wins five-set thriller against Andreas Seppi . Australian hope will play Andy Murray in the last eight .
Rafael Nadal into quarterfinals of Australian Open . Eugenie Bouchard and Maria Sharapova to meet in women 's quarters . Nick Krygios wins five-set thriller against Andreas Seppi . Australian hope will play Andy Murray in the last eight .