work this out ! earlier this year, a great sports star, who is married to a wife who is herself a great former sports star, ended his illustrious career when he was defeated by a little-known player with the same surname as a great former sports star who is of the same nationality as the wife of first mentioned great sports star. What is the surname of the little-known player ?
Benjamin Becker beat Andre Agassi in this year's US open. He is from Germany as is Agassi's wife Steffi Graf and of course the former Wimbledon Champion Boris Becker.