Rory McIlroy falls off the lead in Chicago as he reveals imminent birth of child

Rory McIlroy watches his tee shot on the second hole during the third round of the BMW Championship, where he finished tied for sixth on Saturday. Picture: Charles Rex Arbogast/AP

Rory McIlroy slipped three shots behind the leader at the BMW Championship as he revealed he was ready to leave the tournament if wife Erica went into labour.

After heading into the third round one shot in front, the Northern Irishman struggled on the tough Olympia Fields course on Saturday, picking up five bogeys along with two birdies to close out the day with a three-over-par 73.