Nicholas James Bollettieri (born July 31, 1931), is an American
tennis coach. He has participated in the development of many leading players, including
Andre Agassi,
Jim Courier,
Monica Seles, and
Mary Pierce. He also has worked with
Maria Sharapova,
Daniela Hantuchová,
Jelena Jankovic,
Nicole Vaidišová,
Sabine Lisicki,
Sara Errani,
Tommy Haas,
Max Mirnyi,
Xavier Malisse,
Venus Williams,
Serena Williams,
Martina Hingis,
Anna Kournikova,
Marcelo Ríos,
Kei Nishikori, and coached
Boris Becker for two years.