Rory McIlroy will play his PGA Championship final round on Sunday with an eye on the rest of his season as much as the defence of his title after another encouraging 18 holes at Whistling Straits.

A fortnight after holding off Sergio Garcia to win the Open Championship, Rory McIlroy overhauled his Ryder Cup team-mate to claim his first World Golf Championship event on Sunday – and with it reclaimed top spot in the world rankings.