• Roger Federer and Rafael Nadal

Roger Federer and Rafael Nadal (Photo : Getty Images)

Rafael Nadal had to admit that it's becoming impossible to beat Novak Djokovic nowadays, adding that the Serb has separated himself from the rest of the field talent-wise.

Nadal, who had contrasting results in his stints in Indian Wells (semifinal) and Miami (second-round), is already training for the first tournament of the European clay-court season in Monte Carlo, which kicks off on April 13th.

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The bests men's tennis has to offer will be there competing for ATP world ranking points and cash prize, including Djokovic whom Nadal considers the man to beat right now.     

"There is much difference between him and the rest. It's impossible to stop him and you have to congratulate him. When you are very good and you have nothing that stops you, like injuries, it becomes a lethal combination," Nadal said of the world's no.1 via Tennis World USA.

Related Story: Tennis News, Rumors: Stan Wawrinka thinks place in history sealed as 'conqueror' of Novak Djokovic, Roger Federer, Rafael Nadal and Andy Murray [ATP News Update]

With his recent victory at Miami, Djokovic collected his 28th Masters 1000 tournament trophy, surpassing Nadal's 27th in Masters event.

Rafa and Nole faced off for the 48th time in the semi-final of the Indian Wells Open and there's a high possibility the two tennis legends will duke it out again deep in the Monte Carlo Masters.

-Meanwhile, Roger Federer is happy with the way his recovery from knee surgery is going. After a stomach virus derailed his comeback hours before his match in Miami, Federer believes he's slowly but surely regaining his old form.

"Couldn't be happier how rehab has gone. It's baby steps. Still at the same time you go from crutches to walking to running to jumping to sprinting. It's pretty incredible to see the progress I've been able to make in a short period of time. I had a great team around me, had great support. It's nice to be back here, show everybody that it was worthwhile to put in the work [via Tennis Tonic]"

The 34-year old Federer seeks to win his first Monte Carlo Masters in his career.