( CNN ) -- The heat was off Roger Federer as he joined fellow grand slam winners Rafael Nadal and Andy Murray in the final 16 at the Australian Open . Federer zipped through a 6-2 6-2 6-3 win over unseeded Russian Teymuraz Gabashvili as the searing temperatures eased in Melbourne and distinctly grayer skies loomed over the show courts . The 32-year-old is chasing a fifth title in Australia and an 18th career grand slam but for now Federer is grateful for small mercies after a niggling back injury saw him lose form in 2013 . `` I 'm just happy waking up in the morning and not feeling like an old man , '' he told reporters . `` So that 's very positive . Right now I feel very fresh and very good physically . `` My first goal was to get through the first week , now clearly the draw is very difficult . I 've done the work , I 've not lost a set so far , so we 'll see how it goes . '' It 's a French test for Federer next as he faces Jo-Wilfried Tsonga , the 10th seed , for a place in the quarterfinals . If he advances to the final eight , Federer would face Murray -- the man who beat him in an absorbing Australian semifinal last season . Murray , the Wimbledon champion , battled through a first set tiebreak to see off Spain 's Feliciano Lopez for his place in the last 16 , where he faces unseeded Frenchman Stephane Robert . Confident was the word Nadal ominously used to describe how he was feeling after he breezed through with a 6-1 6-2 6-3 win over Gael Monfils . `` Well today I think I have to say that I played well from everywhere , no ? '' the Spanish world No . 1 teased reporters after his match in Melbourne . In the women 's draw , defending champion Victoria Azarenka lost just one game as she whizzed into the fourth round in Melbourne . There she will face American Sloane Stephens in a rematch of last year 's semifinal when Azarenka caused a stir by taking a medical timeout just as Stephens appeared to have the upper hand in the second set . `` We left it all here last year , '' said Azarenka , when asked if she had spoken to Stephens about the incident . `` That 's what is important for me , to play another match . I 'm looking forward to it . '' Russian third seed Maria Sharapova hit her way through a tight second set to see off France 's Alize Cornet 6-1 7-6 while fifth seed Agnieszka Radwanska and Jelena Jankovic also advanced . But there was disappointment for Danish 10th seed Caroline Wozniacki as she lost 6-4 5-7 3-6 to unseeded Spaniard Garbine Muguruza . Wozniacki , who is engaged to golfer Rory McIlroy , said she now intends to zone out from the Australian Open -- although she said it politely of course . `` When I 'm not in the tournament anymore , it sounds rude , but I do n't really look at the games anymore , '' she explained .
Four - time Australian Open winner Roger Federer reaches last 16 . Top seed Rafael Nadal goes through with victory over Gael Monfils in Melbourne . Wimbledon champ Andy Murray sees off Feliciano Lopez to join them in fourth round . Maria Sanchez , Sloane Stephens and Victoria go through in men 's draw .