Nick Kyrgios introduces fans to his friend Monty who is learning to play tennis from his wheelchair

Nick Kyrgios introduced his followers to his 'cheeky' mate Monty on Wednesday.

The tennis champion, 26, couldn't stop smiling as he posed next to the 'ambitious' young boy, who he revealed was learning to play tennis from his wheelchair.

'Meet Monty!!' Nick captioned the image. 'He has cerebral palsy but is still a very ambitious tennis player, he is also learning to play out of the chair!''

When he saw me his spirits were high and as you can see he was a little cheeky,' he added, before saying: 'This is why I play. Keep believing and dreaming young king.'

Nick's girlfriend Costeen Hatzi was quick to comment on the sweet post, writing: 'So cute, what a champion.'

Nick responded: '@costeenhatzi my babe! You would of loved him, such a character.'

Nick's name soared to headlines last month, after he won his first grand slam title with close friend Thanasi Kokkinakis in the men's doubles at the Australian Open.

Kyrgios and Kokkinakis enjoyed a brilliant run at Melbourne Park, carried to the final by a wave of raucous support.

It culminated in a 7-5 6-4 victory over fellow Australians Matt Ebden and Max Purcell in front of a packed crowd on Rod Laver Arena.

The pair celebrated with a chest bump as they became the first all-Australian pair to win the title since Todd Woodbridge and Mark Woodforde in 1997.

Kyrgios and Kokkinakis came through the junior ranks together and won the Wimbledon boys' title together nine years ago.

Nick said at the time: 'This week has been a dream come true and I wouldn't want to do it with anyone else. I'm just super happy. I don't know how we're doing this or what's going on.'

Away from the court, Nick is happier than ever with his new girlfriend Costeen, 21.

When recently asked by a follower whether he knew she was 'The One' the first time he saw her, Nick replied 'Yes' with a lock emoji.

He also described Costeen as 'the funniest person' he knows, revealing that they 'literally laugh 95 per cent of the time' and that she 'brings out' the best in him.