Rory McIlroy slips down US Open leaderboard after struggling on back nine

Rory McIlroy struggled on the back nine during his US Open round, slipping seven shots off the pace after being in contention at the turn. The Northern Irishman's poor back-nine performance saw him fall down the leaderboard at the major championship. McIlroy had been well-positioned heading into the latter stages of his round before his game deteriorated.