World number one Rafael Nadal is through to the Australian Open 3rd round after his straight-set victory over Leonardo Mayer of Argentina.

Nadal, 31, saw off the world number 52 6-3 6-4 7-6 (7-4) and will now face Bosnia and Herzegovina’s Damir Dzumhur in the last 32 after the world number 30 beat John Millman 7-5 3-6 6-4 6-1.

Speaking after his match, Nadal said: “I’m happy to be in the third round and a second victory in a row is very important news for me.”

“This tournament is my favourite of the year, so I want to stay here as long as possible.” he added.

The top seed also talked about the high temperatures experienced at the tournament. He said: “I think it’s a health issue.”

“Even though I like sometimes to play with heat. When it’s too much, it becomes dangerous for the health.

“I would not like to see here retirements, conditions that create a bad show for the crowd.

“The crowd is suffering too. In the courts that we have the roof, why not put the roof when the conditions are so extreme? I’m going to practise indoors tomorrow.” he concluded.

Third seed Grigor Dimitrov survived a second round scare before scraping past American qualifier Mackenzie McDonald.

The in-form Bulgarian later won against the 186th ranked player 4-6 6-2 6-4 0-6 8-6 after three hours and 25 minutes.

Speaking after his match against McDonald, who played the match of his life, the 26-year old said: “He deserves a lot of credit. He played an unbelievable game.”

“I had to fight so much and in the end I think my experience helped me.

“I’m so happy with the result and the fight.” he concluded.

Dimitrov will now face Russian 30th seed Andrey Rublev for a place in the last 16.