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Fifteen-year-old Lydia Ko is the youngest LPGA Tour winner in history courtesy of her win at the Canadian Women's Open. She was just 14 when she triumphed at the the New South Wales Open in January 2012, becoming the youngest player to win a professional tournament. She clinched the U.S. Amateur Championship two weeks ago. Getty Images
Guan Tian-Lang, 13, made history as the youngest player at a European Tour event when he teed off at his home China Open in April 2012. Volvo in Golf
However, he could not better the achievement of Jason Hak, who was 14 when he became the youngest player to make the halfway cut at a European Tour event at the 2008 Hong Kong Open. Getty Images
Japan's Ryo Ishikawa is the youngest male player to win a professional tournament. He was 15 when he triumphed at the Munsingwear Open in 2007, and has since gone on to become a top-level tour competitor. AFP/Getty Images
Before Ko, Lexi Thompson was the youngest player to win on the women's LPGA Tour. The American was 16 when she triumphed at the LPGA Classic in Prattville, Alabama in September 2011. Getty Images
Thompson is the youngest player to win on the European Ladies' Tour. Here she receives her trophy at the Dubai Ladies Masters on December 17, 2011. AFP/Getty Images