He made Andre Agassi the Wimbledon champion, he was the teacher of world tennis stars and became a legend himself: tanned, wiry and unyielding, Nick Bollettieri stood on the court of his academy in Bradenton/Florida until old age. There, where he showed some of the greats the way to the top of the world. The son of Italian immigrants died on the second Sunday in Advent at the age of 91.