MALAYSIA - Louis Oosthuizen drove away mental and physical fatigue to bounce back from last week's US Masters heartbreak and romp to a three-stroke win in the rain-hit Malaysian Open in Kuala Lumpur yesterday.

Oosthuizen, who finished runner-up in the Masters to American Bubba Watson, registered a total of 17-under 271, three ahead of Britain's Stephen Gallacher.

The 2010 British Open champion, who made a 30-hour journey from Augusta National to take part in the $2.5m (R20m) event, fired a four-under 68 in the final round to win his fifth European Tour title.

"It would have been better if I had the green jacket," said 29-year-old Oosthuizen.

"I thought I was going to be a lot more tired. It was a long journey to get here and I have to be honest and say that I didn't expect to play this well because of the tiredness."

Gallacher, 37, who signed a wrong score in the morning during his third round, hit a bogey-free round of two-under 70.

Rafael Cabrera-Bello of Spain, Danny Willet of England and Asian Tour rookie David Lipsky of the US shared the third spot, five shots behind Oosthuizen.