ANDY Murray surprised viewers during his latest match at the Australian Open.

The tennis player was seen cracking jokes after his victorious match against Thanasi Kokkinakis at the Australian Open, including a cheeky quip about being "big" in some departments. 

Showing his sense of humour, Murray made the admission during his interview with Eurosport saying "I have a big heart" before the presenter said, "Well Andy, if I may say, you have big everything I think."

As Murray laughed in response he said: "I'm not sure my wife would agree."

The tennis star's joke came after a tense match that lasted five-hour and 45-minute match, ending at 4am. 

Andy Murray describes Australian Open as a 'joke'

During the match, things got heated when Murray said the rules were 'disrespectful' after players were not allowed to take a toilet break.

He said: "Do you know something? I respect the rules.

"It's so disrespectful that the tournament has us out here until 3 f****** 4 o'clock in the morning and we're not allowed to go and take a p***. 

"It's a joke. And you know it as well. It's disrespectful. It's disrespectful to you. It's disrespectful to the ball children. It's disrespectful to the players. And we're not allowed to go to the toilet. Ridiculous."

What time is Andy Murray vs Roberto Bautista Agut?

Murray will take part in his third-round match on Saturday night at the Australian Open, making it Saturday morning for UK viewers. 

The match is scheduled to start at 7pm local time, 8am GMT, allowing Murray not to wait for other matches to finish before taking to Margaret Court Arena.