British number one tennis star Andy Murray has revealed that he tends to avoid watching his brother Jamie's matches on TV due to fear that he'll lose.

Jamie Murray, who is one year older than the two-time Grand Slam champion, is a doubles player and is currently competing at Wimbledon.

Andy's singles campaign at the All England Club has reached the quarter-final stage after he sealed a four-set victory over Ivo Karlovic on Monday.

In his column for BBC Sport, Andy wrote: "One person I rarely watch on TV is my brother Jamie. I don't really like it. It's probably not the case but it feels as though when I watch him, he loses.

"When he played the mixed doubles final [at Wimbledon] in 2007 I was just pacing around, away from Centre Court, checking the score from time to time. I only ran out for the last game when it looked like they might win.

"I couldn't watch the end of his match on Monday evening because I was talking to the media, and it obviously worked for Jamie!"

Murray will take on Vasek Pospisil in the final eight at Wimbledon on Wednesday.