Conversation so far:
Who was Martina Hingis?
Martina Hingis is a Swiss former professional tennis player.
How many career games did Martina Hingis play?
When did Martina Hingis retire?
She retired in November 2007 after being hampered by a hip injury for several months.

Question: Was she injured often?
Self-contained rewrite: Was Martina Hingis injured often?