Rory McIlroy speaks after his second round at Valhalla which put him in pole position to secure his fourth Major trophy.

In awful conditions at the PGA Championships, McIlroy shot a 67 to continue his superb run of form.

It was the world No1's 12th succes­sive sub-par score and a nine-un­der-par halfway total of 133 means he is a combined 41-under-par for his last 10 rounds.