Note: Single-source report; awaiting corroboration.
Federica Pellegrini set a world record in the 400m freestyle before competing in the 200m freestyle at the 2009 World Championships in Rome.
In the 200m freestyle, she broke the world record in the semi-finals.
In the final, Pellegrini set a new world record with a time of 1:52.98, winning the gold medal.
The crowd at the Foro Italico in Rome responded with great excitement to her achievement.