Australian Open 2014: day six - in pictures

Maria Sharapova serves during her 6-1, 7-6 win over Alize Cornet Photograph: Jason Reed/Reuters

To the victor, the arm ache after signing autographs Photograph: Aaron Favila/AP

Roger Federer had another easy win, taking just an hour and 41 minutes to despatch Teymuraz Gabashvili 6-2, 6-2, 6-3 Photograph: Ryan Pierse/Getty Images

Garbine Muguruza, the Spaniard ranked 38 in the world, added the former world No1 Caroline Wozniacki to her list of high-profile victims, winning 4-6, 7-5, 6-3 Photograph: Paul Crock/AFP/Getty Images

Victoria Azarenka has hit a bit of form and embarrassed Yvonne Meusburger in an hour, dropping just a single game and winning 24 of 29 points in the second set to win 6-1, 6-0 Photograph: Michael Dodge/Getty Images

Rafael Nadal needed to focus to overcome a Gael Monfils shaped challenge and progress with a 6-1, 6-2, 6-3 win Photograph: Clive Brunskill/Getty Images

Despite some vocal outbursts of frustration, eighth seed Jelena Jankovic was too good for Japan's Kurumi Nara, winning 6-4 7-5 Photograph: Rick Rycroft/AP

Agnieszka Radwanska had to come from one set down to triumph 5-7, 6-2, 6-2 over Anastasia Pavlyuchenkova Photograph: Rick Rycroft/AP

Both Andy Murray and Feliciano Lopez were not at their best in the early stages of their match but Murray produced it when it mattered in the tie-break to take the first set Photograph: Clive Brunskill/Getty Images

The fourth seed took the upper hand as the match continued, and in the final set fired 11 winners and dropped just one point behind his first serve to seal a 7-6 (7-2), 6-4, 6-2 win in two and a quarter hours Photograph: Quinn Rooney/Getty Images

Jo-Wilfried Tsonga powered into the last 16 with a with a 7-6(5) 6-4 6-2 victory over his friend and countryman Gilles Simon Photograph: Rick Rycroft/AP

Sloane Stephens needed a powerful first set comeback against Elina Svitolina to secure her place in the last 16, as she eventually won the match 7-5 6-4 Photograph: Mal Fairclough/AFP/Getty Images

This fan was pleased to see Kei Nishikori romp to a 7-5 6-1 6-0 victory over Donald Young Photograph: Andrew Brownbill/AP