Lee Westwood has insisted that he is "not too disappointed" despite squandering a three-shot lead at the British Open on Sunday.

The Englishman started the day two shots ahead of the chasing pack and at one stage extended that by a stroke, but a four-over par 75 at Muirfield means that his wait for a maiden Major title goes on.

Westwood lost out to Phil Mickelson, who shot a final round of 66, but he claims that he is not downbeat following his slip-up.

"It's a tough golf course and you've got to have your 'A' game. I missed a few shots out there. Sometimes you play well and somebody plays a bit better and sometimes you play poorly," Westwood told Sky Sports News.

"I didn't really do either and Phil obviously played well. He shot the round of the day, five-under par and birdied four out of the last six - that's a pretty special finish in a major championship. But you've got to play well to give yourself your own momentum, and I just couldn't get there.

"I didn't do a lot wrong, I just didn't do enough right. I know what I've got to work on. I finished top three in a Major championship. I would like to have won but you can't not take positives from top three in a major. I keep putting myself in contention. I'm not too disappointed. I don't really get disappointed with golf any more."

Westwood finished tied for third with Ian Poulter and Adam Scott on one-over par.