Did Sue Barker or Roberta Vinci hold a higher career singles ranking?
Roberta Vinci: Roberta Vinci (] ; born 18 February 1983) is an Italian tennis player. Roberta Vinci:  Up until 6 April 2015, she held the position of World No. 1 in doubles, while reaching a career-high of World No. 7 in singles in May 2016. Sue Barker: Susan Barker, OBE (born 19 April 1956 in Paignton, Devon) is an English television presenter and former professional tennis player. Sue Barker:  She reached a career-high singles ranking of World No. 3.
Susan Barker