Here is what Roger Federer,Maria Sharapova will wear at the Australian Open

Top-ranked Rafael Nadal and defending champion Roger Federer have been seeded first and second for the Australian Open, meaning they can only play each other at Melbourne Park this month if they set up a rematch of last year's final.

"It's impossible to be more motivated than last year or any year".

Djokovic, a six-time Open champion, has turned to coaches Andre Agassi and Radek Stepanek for advice on how to adapt from the injury. He stayed injury free until the final stages of his brilliant 2017 campaign, winning a 10th French Open title and then claiming the US Open, before familiar knee problems returned putting an end to his season at the ATP Finals in London.

Federer will saddle up for a 19th time in the main draw at Melbourne Park, looking to frustrate "Generation Next" once again and defend the title he won past year during a stunning comeback from knee surgery.

"In terms of professional things, I spoke to him few days ago, speaking about how the life going, how the tennis going", he said of Toni.

"He won a couple Grand Slams".

The Serbian said: "It is not 100 per cent healed".

Danger lurks at nearly every corner, with former Wimbledon finalist Milos Raonic and a resurgent Juan Martin Del Potro, the man who beat Federer for the 2009 U.S. Open title, looming as threats before the quarter-finals. "They spent a lot of hours analyzing my serve".

The Spaniard will be determined to go one better in Australia this year, but there are more concerns over his fitness after he pulled out of his scheduled opening two tournaments of 2018 in Abu Dhabi and Brisbane, although he did take part in the Tie Break Tens event and then beat Dominic Thiem in a surprise exhibition match ahead of his first-round clash against 37-year-old Dominican Victor Estrella Burgos. I lost to Nadal in five sets in the Australian Open. I still have this afternoon and tomorrow, the last practice before the competition starts for me.

"I've showed on multiple occasions over the year that I can play and beat the best guys in the world", Zverev said. I know that if I get myself to desired level of performance - mental and physical - that I can actually have a good chance to go far in the tournament.

"Even the first part of previous year, I did struggle a lot with the performance", he admitted.

"So let's see. There's not much more I can do. I am not the one to say, but somebody has to look about what's going on", he said.