Which of the following was the greatest service returner in the history of the game of tennis: Andre Agassi or Martina Hingis?
Martina Hingis Martina Hingis (born 30 September 1980) is a Swiss professional tennis player, a former world No. 1 singles player and currently ranked world No. 2 in doubles by the WTA. She has spent a total of 209 weeks as the singles No. 1 and has won five Grand Slam singles titles, thirteen Grand Slam women's doubles titles, winning a calendar-year doubles Grand Slam in 1998, and seven Grand Slam mixed doubles titles; for a combined total of twenty-five major titles. In addition, she has won the season-ending WTA Championships two times in singles and three times in doubles, and an Olympic silver medal.
Anna Chakvetadze Anna Djambuliovna Chakvetadze (Russian: Анна Джамбулиевна Чакветадзе ; Georgian: ანა ჯამბულის ასული ჩაკვეტაძე ; born 5 March 1987) is a retired Russian professional tennis player who was born to a Georgian father and a Russian mother. On 10 September 2007, she reached her career-high professional singles ranking of world no. 5. She has won eight WTA singles titles and appeared in the 2007 US Open semifinals. She was also a quarterfinalist at the 2007 Australian Open and the 2007 French Open. She announced her retirement on 11 September 2013, due to a persisting back injury. She is currently a commentator on Eurosport channel.