Which tennis player, Marion Bartoli or Geoff Masters, had a more prominent career in singles tennis matches?
Marion Bartoli: Marion Bartoli (] ; born 2 October 1984) is a French former professional tennis player. Geoff Masters: Geoff Masters (born 19 September 1950) is an Australian former tennis player. Geoff Masters:  He was part of doubles winning pairs in the US Open, Australian Open and Wimbledon tournaments during the 1970s.
Marion Bartoli