si.robi / Wikimedia Commons
Emma Radacanu at age 15
Emma Radacanu runs for a backhand during a juniors match at Wimbledon on June 24, 2018. Emma Radacanu was born on November 13, 2002, so she was still just 15 when this photo was taken. Three years later she made a spectacular run to win the 2021 U.S. Open.