Coco Gauff wrote her name into the history books on Sunday by winning the Linz Open Photo Courtesy of Juergen/REX

Coco Gauff makes history AGAIN!

In her first WTA Tour final, Gauff defeats Jelena Ostapenko in three sets to win the Linz Open in Austria.

At 15, Gauff becomes the youngest American woman to win a tour-level singles title since 1991.