Jordan Spieth, at top of his game, takes aim at Rory McIlroy

Windermere: Jordan Spieth, who created a buzz when at 19 when he became the youngest player to win a PGA Tour event in 82 years, is playing the best golf of his 21-year-old life and taking aim at top ranked Rory McIlroy.

Spieth followed up a six-stroke victory at last week`s Australian Open with a 10-shot romp at the Hero World Challenge at Isleworth on Sunday to end his year inside the world top 10 at number nine.

If not for a rare four-putt on the 17th hole at Dunlop Phoenix in Japan, it might have been a hat-trick for the Texan, who finished one shot behind there.

"Right now, (my game) is at its highest level it`s ever been," Spieth said after his final-round 66 for 26-under-par 262 and a 10-stroke victory over Swede Henrik Stenson.

"This is the best I`ve ever played, which is what I said in a media center in Sydney last week. I played better this week."

Spieth made a huge splash when he won the 2013 John Deere Classic in a playoff. Now he has designs on winning majors and climbing to the top of the world rankings.

"In order to take it to the next level and try and win majors, I got to look to Rory," Spieth said of the 25-year-old Northern Irishman, who won the last two majors -- the British Open and PGA Championship -- to take his haul to four.

"He`s the youngest guy, the one with the most success. He`s number one in the world and setting the bar. He`s the one we`re all chasing," added Spieth, who held the Masters lead during the final round before finishing joint second.

"I think I did a good job of starting that chase these last couple of weeks. That`s only really the beginning of what needs to happen for the ultimate goal, which is to overtake him."