ROME — Italy's Federica Pellegrini has set her second world record of the world swimming championships and the 15th overall, equaling the number from the meet two years ago.

Pellegrini, who already set a record in the 400-meter freestyle, took down the mark in the 200 free in a semifinal heat Tuesday. The time of 1:53.67 broke her own record of 1:54.47 set in March.

The record-breaking has now matched the 2007 worlds in Melbourne — and through only the third day of an eight-day meet.