Andy Murray says there's no way he'll be retaining his Wimbledon title if he plays the way he did in his shock Queen's Club Championships defeat.

Britain's world number one was beaten in straight sets by Australian Jordan Thompson, a late replacement for his original first round opponent, Aljaz Bedene.

"I knew before the tournament that I still have some way to go if I'm going to get up to the level where I challenge for the biggest titles, but I certainly expected more from myself," he said with in his column with the BBC.

He pointed out: "I'm not the only player to suffer a surprise on the grass - Roger Federer lost in the first round in Stuttgart, and Stan Wawrinka and Milos Raonic also lost at Queen's on Tuesday."

It's the biggest win in the career of Thompson who's ranked 90 in the standings.

"When I heard I was playing Andy I was pretty nervous," he said after yesterday's victory. "My main aim was to just go out there and enjoy it."