Who won a Grand Slam singles title first, Thomas Muster or Goran Ivanišević?
Thomas Muster: Thomas Muster (born 2 October 1967) is a former World No. 1 tennis player from Austria. Thomas Muster:  One of the world's leading clay court players in the 1990s, he won the 1995 French Open and at his peak was known as "The King of Clay."
i don't know