Iga Swiatek

Top-ranked Iga Swiatek is separating from her coach Tomasz Wiktorowski.

The Polish tennis player announced the split Friday, saying the decision was taken together.

During the three years Swiatek worked with Wiktorowski, the Polish player won four of her five Grand Slam titles and rose to the top of the women’s rankings.

“After 3 years of the greatest achievements in my career, together with my coach Tomasz Wiktorowski we decided to part way,” Swiatek wrote in a post on Instagram.