Nicholas James Bollettieri is an American tennis coach. He pioneered the concept of a tennis boarding school, and helped develop many leading tennis players during the past decades, including Andre Agassi, Jim Courier, Monica Seles, and Mary Pierce. He has also worked with Maria Sharapova, Daniela Hantuchová, Jelena Janković, 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.
