ANDY MURRAY has said he thinks he is in the ‘end phase’ of his career – but his elder sibling Jamie reckons he still has some way to go.

The 29-year-old has made his money in doubles, a less-demanding discipline where the best doubles players like Daniel Nestor of Canada and Leander Paes of India can play into their 40s.

Despite his mixed doubles win with Jelena Jankovic back in 2008, Jamie craves some success in the men’s doubles with his Aussie partner John Peers.

Today he will take on last year’s winners Vasek Pospisil of Canada and Jack Sock of USA, the No.3 seeds and reigning champions, on Court No.12.

So seriously does he take the chance of winning in his preferred discipline that he declined the easy money potentially on offer in the mixed doubles competition.

“It was great to win the mixed doubles, of course, but my bread and butter is the men’s doubles,” said Jamie.

“I could play another ten years, of course. Do I think, right now, that I will play another ten years? Right now I would probably say no, but it is a pretty good lifestlyle, I make pretty good money and would I be able to replicate that in another job?

"You should keep doing it as long as you can, because once you stop you can’t really go back. Guys like Nestor and Paes are in their 40s, Nenad Zimonjic is probably 38, for an hour-and-a-half’s work it probably isn’t too demanding.”

Sock, of the USA, is playing here with a fractured finger, while it will be Pospisil’s second match of the day, following his last-16 singles encounter with Viktor Troicki of Serbia on the same court.

Jamie knows a top-level performance will be required to book a place in the quarter-finals, but doesn’t see why he and his Aussie partner – a settled pairing who have been together since the 2013 French Open – cannot prevail.