Northern Ireland’s Rory McIlroy has set himself the challenge of winning this season’s FedEx Cup as he looks to underline his dominance in the world of golf.

The world number one may have already been victorious in the Open Championship at Hoylake and US PGA Championship at Valhalla, but he is far from done yet.

The 25-year-old is eyeing the $10million FedEx Cup bonus prize and could do his chances the power of good by winning the ongoing BMW Championship at Cherry Hills Country Club, Colorado.

McIlroy won the BMW tournament two years ago but still missed out on the prestigious FedEx Cup title to eventual winner Brandt Snedeker and is in no mood to take his foot off the gas just yet.

The four-time major winner said: “It’s been such a great year on the golf course that if I wasn’t to go ahead and win the FedEx Cup it would definitely be disappointing.

“I really want to cap off this summer as best as I can and I’ve got two more weeks to push through, even though I am feeling a little tired I’m trying to conserve as much energy as possible.

“Not winning a couple of years ago did add a little bit of fuel to the fire and it probably does make me a little bit more determined.”

McIlroy shares a three-way lead with Jordan Spieth and Gary Woodland following day one of the BMW Championship but poor weather saw play suspended with nine players still to complete their rounds.