The Portuguese star challenges his Spanish mate to a game of tennis where Nadal's racquet is put to the test against Ronaldo's new day-glo Nike Mercurial Vapor VIII boots - with impressive results!

The tennis and football legends trade serves and kicks across the net with a tennis ball, at first for fun, then things get a little more competitive.

Nadal thunders a serve cross court which is half volleyed straight back by Ronaldo and the game is on.

A rapid succession of volleys from racquet and boot ensue as the players conduct a rapid rally of headers, volleys and forehands...and then the football appears!

CHECK OUT THE VIDEO HERE:

After filming, Nadal admitted to Ronaldo he was a huge fan of the sport and Ronaldo himself.

"I like sports but my favourite one has always been football," he said. "I am always watching football.

"Actually I watch you all day, enjoying your goals. My uncle played as a defender for Barcelona and also for Mallorca."

Ronaldo revealed the new boots had been specially designed by Nike after he asked for them to create a boot with mixed studs.

"I don’t think your uncle would have liked those, because possibly his boots only had studs, and these ones are mixed ones," he told Nadal.

"I’ve always played with these, and I feel great with them, I love them. I used to play in England, and with regular studs you ended up sliding a lot.

"I spoke to Nike and I asked them to do a boot with mixed studs for me and they did."

Nadal added: "I wish we could play tennis in those…"

SEE THEIR CHAT IN FULL HERE: