Which German tennis player holding 13 Masters Series titles and an Olympic gold medal attended the 1997 Wimbledon Championships in London? 
1997 Wimbledon Championships: The 1997 Wimbledon Championships was a tennis tournament played on :grass courts at the All England Lawn Tennis and Croquet Club in Wimbledon in London in England. Boris Becker: Boris Franz Becker (] ; born 22 November 1967) is a German former world No. 1 professional tennis player.
i don't know