Question 391

'X'(b. July 31, 1931 in Pelham, New York) is an American coach who is credited with developing many world-class champions, including Andre Agassi, Jim Courie, Monica Seles, and Mary Pierce. Recently, he has worked with 2006 U.S. Open champion Maria Sharapova, Jelena Janković, and Nicole Vaidišová. He has also worked with Tommy Haas, Max Mirnyi, Xavier Malisse, Venus Williams, Serena Williams, Martina Hingis, and Marcelo Ríos. He also coached Boris Becker for two years.he ahs come into news due to this years french open>who is 'x'

ans: Nick Bollettieri 

        cracked by all . Brilliant guys !!!!