Ultra-talented  American Jordan Spieth has emerged as a real threat to Rory McIlroy’s world dominance following his tearaway victory in the Australian Open in Sydney.

Spieth stormed his way to a six-shot success on the Australian Club course and claim victory for only a second time in his short professional career and for a first time outside of the US.

The 21-year old Texan, who made his Ryder Cup debut earlier this year at Gleneagles, is the 10th American-born golfer to win the Australian Open and he joins some of the greats of the game including compatriots Jack Nicklaus, Arnold Palmer, Tom Watson, Bill Rogers and Gene Sarazen as American-born winners of Australia’s premier golf event.

American sensation Jordan Spieth emerges as a threat to Rory McIlroy’s world dominance. (Photo – Anthony Powter/www.golffile.ie)

“I have looked at the trophy and I didn’t realise Gary Player has won the trophy so many times while Jack Nicklaus has won it six times,” he said.

“But what strikes me is the number of Hall of Fame players who have their name on the trophy and it’s really cool my name will now be added to the trophy.”

Spieth set a new course record of an eight under par 63 to ensure his name now follows that of McIlroy on the Stonehaven Trophy.

But while McIlroy continues to count the days to next April’s Masters, and his chance to become only the sixth player to win a golfing Grand Slam, Speith is now a serious threat to deny the 25-year old Northern Irishman.

And this is not because of what Spieth achieved on a first visit to Australia but what he did earlier this year on the first visit to Augusta National.

In fact, Spieth led at one stage before settling for a share of fourth place behind fellow American Bubba Watson.

And before leaving Sydney, Spieth was not only delighted in winning just a second pro career victory but having denied the World No. 1 ranked McIlroy and the World No. 3 ranked Adam Scott.

“I take a lot of confidence from the fact that this golf course was challenging for everybody including the World No. 1 and the World No.3,” said the new World No. 11.

“So I can take a lot not only from beating them but the whole field.   You only have to scroll down the board and there is so many who play on the PGA Tour and faces that I see on a regular basis on the PGA Tour.

“It was fun for me also to meet so many new people this week and getting to play with some new guys, and guys who I have played before.”