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.