The 235-yard, par-three 16th at Port Royal Golf ClubGraeme McDowell will face just one current major champion in next week’s $1.35m PGA Grand Slam of Golf in Bermuda.

Louis Oosthuizen, winner of The Open at St Andrews in July, has failed to recover form the left ankle ligament problem that prevented him from returning to the Home of Golf for last week’s Alfred Dunhill Links Championship.

The South African, who injured himself on a hunting trip when he stood in a pothole, has been replaced by 2001 US PGA winner David Toms from the 2010 major championship points list.

That means that McDowell and US PGA champion Martin Kaymer are the only current major winners set to battle for a top prize of $600,000 over 36 holes next Port Royal Golf Course next Tuesday and Wednesday.

Masters champion Phil Mickelson withdrew last month with the PGA of America explaining that he needed to rest “due to his diagnosis of psoriatic arthritis” and to spend time with his family following a busy end to his season.

Left-hander Mickelson, whose wife is battling breast cancer, was replaced in the field by three-time major winner Ernie Els.

Mickelson’s withdrawal meant the event was left without an American participant for the first time since 1994.

That scenario has now been averted by Oosthuizen’s withdrawal and his replacement by Toms.

Guide to the 2010 PGA Grand Slam of Golf