Rasmus Neergaard-Petersen held his nerve on the final hole to win the Australian Open and claim his first DP World Tour title.

Tied with former Open champion Cameron Smith heading to the last, Dane Neergaard-Petersen sank a difficult up-and-down for par, while the Australian three-putted for bogey.

Neergaard-Petersen, 26, carded a one-under-par 70 to finish on 15 under at the Royal Melbourne.

“Even from the outside you can look calm, but it was a storm inside all day,” Neergaard-Petersen said.

“I’m really at a loss for words. It’s been a battle all day.”

South Korea’s Kim Si Woo was third on 13 under, while Northern Ireland’s Rory McIlroy finished eight strokes off the pace.

Neergaard-Petersen, who led by two shots overnight, slipped back into a share of the lead with Smith after bogeying two of the first nine holes.

They traded the lead on the back nine before both birdied the 17th to set up a final-hole finish.