Two-time major champion Andy Murray concedes he does not know if he will win another grand slam tournament.

Britain's Andy Murray gestures during a news conference after losing his final match against Serbia's Novak Djokovic at the Australian Open tennis tournament at Melbourne Park, Australia, January 31, 2016.?[Photo/Agencies]

The world number two broke his duck with glory at the 2012 US Open, before delighting a partisan home crowd by lifting the Wimbledon crown the following year.

Two unsuccessful final appearances – at the 2015 and 2016 Australian Opens – have followed, with this year's defeat to Novak Djokovic swiftly put into perspective by the birth of his first child.

When asked if he felt further major success would come his way, Murray told The Guardian: "I don't know. When I lost the Wimbledon 2012 final I didn't know if I'd ever win a slam.

"Then when I won the US Open they were asking: 'What's going to happen now?' I thought: 'It's taken me this long to win one I don't know if I'll win another.'

"And now that I've not won one for a couple of years I don't know if I'll win another one.

"But I believe I still can. I've been close the last year. I had my best French Open. At Wimbledon I was playing extremely well and it took [Roger] Federer to play an unbelievable match.

"He served 79 per cent first serves which might happen once a year – twice at best. I can definitely still win more slams. I've just got to take the chances when they come."