The world number one suffered a total rupture of ankle ligaments in July and was unable to defend his Open and WGC-Bridgestone Invitational crowns because of the injury.

McIlroy, who is the defending champion at the US PGA, played practice rounds at the Wisconsin layout over the weekend, and played nine holes on Monday.

“If felt fine. I’ve come a long way in five weeks,” he added. “If anything, my ankle feels even better when I swing hard.” The 26-year-old revealed he began practicing on the day Zach Johnson took his Open crown at St Andrews.

“I did think about coming back last week at the Bridgestone but Steve (McGregor, his fitness coach) held me back. He thought it important for me to basically play a tournament behind closed doors and after I completed that successfully, it felt the right time to come.” McIlroy will play with Masters champion Jordan Spieth and Open champion Zack Johnson.

Last year McIlroy produced a thrilling, final nine when capturing the PGA title at Valhalla 12 months ago. Since then, the Major scene has been dominated by Spieth, who reached the grand old age of 22 on July 27.

If his Masters victory last April was remarkable, success in the US Open at the quirky Chambers Bay was astonishing, especially with Dustin Johnson having had two putts for the title from 12 feet on the 72nd green, only to fail.

When the 2010 PGA Championship was last staged at Whistling Straits, it will be always be remembered for Dustin Johnson, mistaking a trampled bunker to the right of the fairway on the 72nd hole for a waste area, so incurring a two-stroke penalty for a grounded club, with the title beckoning. It was also where Kaymer beat Bubba Watson in a play-off and McIlroy shared third place with Zach Johnson, the recently-crowned Open champion.

With the Americans dominating all the majors to date you can be sure the Europeans will be keen to end the major season with a victory.

PGA Tips Henrik Stenson at 28/1-hitting form at the right time.

Zack Johnson at 45/1 represents decent each way value-he finished in the top 5 in 2010 at the same venue.

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