birdie

Iwai, who played alongside her identical twin sister, Chisato, on Saturday, curved a last-chance shot from behind a tree to try and cut into the lead to set up her birdie putt.

Thomas made 11 birdies in a 10-under-par 61 at Harbour Town Golf Links in South Carolina.

He briefly led on Sunday after a birdie on the second coupled with McIlroy's double bogey on the first but eventually finished tied for fifth.

A blistering start to his third round saw McIlroy sink three birdies and an eagle as he became the first player to card threes on each of the opening six holes.

And while others faded, 36-hole leader Rose birdied six of his final eight holes to force a play-off and keep alive the 2013 US Open winner's dream of winning the Masters at the 20th attempt.