No problems for Federer

Four-time champion Roger Federer eased into the last 16 of the Australian Open with a 6-2 6-2 6-3 victory over Teymuraz Gabashvili of Russia.

The 32-year-old Swiss was rarely troubled by the world No 79 but knows the hard work starts now as he tackles Jo-Wilfried Tsonga in the next roudn.

Tsonga progressed at Melbourne Park courtesy a 7-6 (7-5) 6-4 6-2 victory over French compatriot Gilles Simon.

Simon is never one to give up but Tsonga upped his game when necessary and sealed the victory when he whipped a forehand winner across the court from the tramlines after one hour and 53 minutes.

"This is clearly a tough draw," he said. "But the important thing now for me is just that I keep playing well and I don't go crazy about who I play now.

"It's just now up to me to bring it in the next match.

"I'm happy that I'm winning my matches in straight sets. It's been different conditions every match. The heat first and the indoor match, and now normal conditions today with a bit of wind.

"So it's just good to get through and get a good feel out there and make sure to win your matches easily if you have a chance. That's what I was able to do today, so I'm pleased."

Grigor Dimitrov reached the fourth round of a grand slam event for the first time when he upset 11th seed Milos Raonic 6-3 3-6 6-4 7-6.

The world No 22 held his nerve to seal victory on his fifth match point when his Canadian opponent netted a forehand to lose the tie-breaker 12-10.

Spain's Roberto Bautista Agut followed up his upset win over fifth seed Juan Martin del Potro with a hugely impressive 6-2 6-1 6-4 victory against 27th seed Benoit Paire and plays Dimitrov next.