American tennis coach
According to Wikipedia,
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 players such as 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 and Kei Nishikori. Bollettieri has also been a tour traveling coach, for the last time with Boris Becker for two years.
Nick Bollettieri is affiliated with the following schools: