Question: Which of the following was the greatest service returner in the history of the game of tennis: Andre Agassi or Martina Hingis?
Sentence (from "Andre Agassi"): Described by the BBC upon his retirement as "perhaps the biggest worldwide star in the sport's history", Agassi compiled performances that, along with his unorthodox apparel and attitude, saw him cited as one of the most charismatic players in history.
Relevant evidence: No