In a recent interview, Spanish tennis legend Rafael Nadal has described Serbian rival Novak Djokovic as “a machine”.

READ | Müller-Weiss Syndrome: Rafael Nadal gives ‘thumbs up’ after undergoing foot treatment in Barcelona

Nadal recently spent time with former racing car driver Nico Rosberg where the tennis star was interviewed by the 2016 Grand Prix world champion.

The pair discussed what made tennis players at the very top different from others.

In the interview, Rosberg tells Nadal he doesn’t think Djokovic is more on the sensitive side, with the Spaniard then replying: “He’s maybe more a machine… in terms of mentality… but I am sure that he has his doubts too.”

Nadal added that he was excited to come back to the tour following a foot injury. He admitted to having doubts over his return but noted he was confident as it’s a process that he’s gone through several times in the past.

WATCH in the video clip below:

Nadal will next play in the Mubadala World Tennis Championship exhibition event in Dubai from December 16-18.

Picture: Novak Djokovic and Rafael Nadal at the French Open (Twitter)