Rory McIlroy surprised to match greats after US PGA win

World number one Rory McIlroy says he "couldn't be more proud of himself" after winning the US PGA Championship on a thrilling final day at Valhalla.

The Northern Irishman becomes the third youngest player of the modern era to win four majors, but admits he "never thought I'd get this far at 25 years of age".

McIlroy, who also won the Open last month, already has his eye on completing a career Grand Slam at next year's Masters.

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