Louis Oosthuizen pulls out of Honda Classic with back problem

Louis Oosthuizen has become the second high-profile player in as many days to pull out of this week's Honda Classic.

The South African, who has struggled with back problems in the past year, has been ruled out of the tournament due to a new injury in the same area.

Oosthuizen performed impressively at the WGC World Match Play Championship last week to reach the quarter-finals, but he shed some light on his injury woes after the event.

"If I can commit myself to hit the shot it's not that bad, but I can't commit. My body is restricting me to go through the shot," the 2010 Open Championship winner told reporters in Arizona after being knocked out by Jason Day.

Justin Rose confirmed that he would miss the Honda Classic on Tuesday.