The coach of Auckland teen Lydia Ko - who has become the youngest golfer to win a professional tournament - says hard work gave her the mental strength needed to win.
Ko, who is 14, made history after winning the pro New South Wales Open in Sydney at the weekend.
It was redemption for the world's number one amateur, who came second a year ago when she three putted the final green.
Coach Guy Wilson says Ko trains 30 to 40 hours a week on top of school work, and the win came with a lot of pressure resting on her shoulders.
He says to win in that sort of field is amazing and shows she puts a lot of time into her technique and the mental side of the game.