The 2015 British Open is set to return to St Andrews without its biggest drawcard next week after Rory McIlroy ruptured his left ankle during a friendly game of soccer.

The defending Open champion posted this picture to Instagram Monday morning of him in crutches and wearing a boot on his left foot. According to McIlroy, he ruptured the left ankle ligament kicking a soccer ball with friends on Saturday. He made no reference to a timetable for returning, only that he’s already begun rehabbing vigorously.

McIlroy’s likely absence will see American superstar Jordan Spieth assume championship favouritism as he looks to claim Major win No.3  for the year and keep his stunning Grand Slam dream alive.