Simplify the following text for a Grade 9 native English-speaking person.
Original: Between 1990 and 1993 , Capriati won six singles titles , including a Gold Medal at the 1992 Barcelona Olympics , defeating Steffi Graf in the final .
Simplified: Capriati made her professional debut in 1990 at fourteen years old . In 1992 , Capriati defeated Steffi Graf during the Barcelona Olympics , winning a Gold Medal .