Overnight leader Louis Oosthuizen eased to a one-shot victory in the ISPS HANDA Perth International after a final-round 71 at Lake Karrinyup Country Club.

Rory McIlroy’s break-up with fiancee Caroline Wozniacki is just the latest incident in a long line to threaten the Irishman’s golf game.

Louis Oosthuizen has been ruled out of the US PGA Championship due to injury.