Newly crowned major champion Jason Day has the world No.1 ranking in his sights.

After claiming the US PGA Championship in record fashion at Whistling Straits and moving to world No.3 Day has shifted his attention to world No.1 Jordan Spieth and No.2 Rory McIlroy as he chases his dream of being crowned the best in the world.

At 27, Day is the old stager when it comes to 22-year-old Spieth, who took over as No.1 with his runner-up finish, and 26-year-old McIlroy, who slipped to No.2, but he’s ready for a rivalry that could last for a decade.

“I still want to accomplish that number one goal of mine, which is to be the best player in the world,” Day confirmed.

“I’m still motivated and still very hungry for that, even after this win.

“Stuff like this is just the icing on the top of the cake, when you work so hard and being able to achieve something like this.

“What I’m looking forward to in the future is the sheer competition of being able to fight against these guys each week. It’s going to be a lot of fun over the next five to ten years.

“As long as I am healthy, I feel like I’m going to be there a long time.”

At Whistling Straits Day stood toe-to-toe with Spieth, who won the Masters, the US Open, was second here and tied fourth at the British Open, just a shot out of a playoff in a phenomenal major season.

But when he kept hanging around the lead the Queenslander refused to yield.

“To be honest, the kid just doesn’t go away. It was tough,” Day said.

“But he said to me in the scoring hut, he goes, `there’s nothing I could do.’

“And it’s a good feeling when someone like Jordan, who is playing phenomenal golf right now says that because it means that he left everything out there on the golf course and my play this week was just so much better … well better than everyone else.

“I was the last man standing, which is great.

“I’m hoping this is kind of a springboard for me to really do some fantastic, great things in the future.”