Nick Kyrgios said he'd be happy to partner Andy Murray in doubles - if only the Scot would get fit.The 22-year-old was participating in a Twitter Q&A on Friday, taking questions on a variety of topics such as potential doubles partners.When asked about the chance of teaming up with Andy Murray, the Australian took the chance to make it clear that he'd be very up for the idea, whilst also poking a little fun at Murray's recent fitness problems."Assuming @andy_murray ever gets fit, then yes I will bestow upon him the pleasure of my skills on the doubles court," he wrote.Murray has missed much of the year to recover from a niggling hip injury which so severely affected his Wimbledon charge.And during his time away from court he has regularly poked fun at Kyrgios by commenting on the Aussie's various Instagram posts.You get the sense watching them play together would certainly be fun!

Kyrgios was clearly having fun answering questions, going on to reveal the most difficult thing about facing all-time-great Roger Federer:

"Mirka heckling and whistling at me before I serve and between serves!!", although he was careful to add '#justkidding' to avoid too much trouble.

He didn't stop there, confirming that the worst hair on the tour belonged to Thanasi Kokkinakis, and that compatriot Matt Reid was the worst dancer (although he did credit Gael Monfils as being the best).

One of the more serious and interesting questions that Kyrgios answered centred around the height of elite players. The best in the world now tend to stand over six-feet-tall and Kyrgios was asked if a player under that height could succeed in the sport.

Kyrgios himself stands at 6ft4in and believes it would be difficult for a short man to cope at the very top.

"I would be surprised," he said, "you need a rocket serve these days and you can't have that under 6ft."

The Q&A came shortly after Kyrgios announced his withdrawal from the tour, bringing his season to a premature close.

A hip injury sustained at Queen's club earlier in the year has been affecting him ever since, and the decision was made in an attempt to avoid surgery.