'I told my wife two months ago that I was going to win in Shanghai,' Pilkadaris said following his triumph at the inaugural Shanghai Open on Sunday.
Pilkadaris carded an even-par 72 on the final round to finish at 8 under, beating Thailand's Boonchu Ruangkit by just one stroke.
Despite his confidence, he still had to work for the win.
Pilkadaris took a two stroke lead into the final round, but bogeyed the first two holes, missing a 7-foot putt on the first hole and knocked his approach shot into a bunker on the second.
He recovered to birdie the fifth and ninth holes, then shot par on the back nine.
With Ruangkit finishing strong, Pilkadaris knew he had to have a solid finish and he nailed a 2-foot putt for the win, a wide grin breaking across his face.
'That was the longest two-foot putt you'll ever make,' he said.
Pilkadaris said the win helped make up for his disappointing finish at last month's Korean Open, where he led after three rounds, only to flounder in the final and finish fourth.
Pilkadaris took second at his last tournament, the Taiwan Open -- his best tour finish up to that point -- before taking a break to get married.
'It's a big relief,' he said of finally winning after those near misses. 'It's fun. I look forward to more.'
Despite his late surge from overnight fourth, Ruangkit said his putter hadn't warmed up quick enough.
'I hit the ball really well all week, but didn't putt well on any of the days,' Ruangkit said. 'I said yesterday that I would not be able to win unless I putted better and that's what happened.'
Fellow Australian Marcus Both finished joint third in Shanghai, together with American Gary Rusnak at five-under. Australian Anthony Summers and South African Craig Kamps followed one stroke back at 4 under.
Eiji Mizoguchi and Satoshi Tomiyama of Japan were tied for fifth at 2 under, along with Somkiat Srisanga of Thailand and Greg Hanrahan of the United States.
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