Elina Svitolina has announced a coaching shake-up, parting ways with coach Iain Hughes:

The 22-year-old Ukrainian has also been working with former No.1 Justine Henin since February, bringing the Hall of Famer on as a coaching consultant. Neither have confirmed whether that relationship will continue in 2017.

Svitolina’s announcement comes on the heels of her career-best season, after making the final of the WTA Elite Trophy Zhuhai to finish the season at her career-high ranking of No.14 and winning a fourth career title in Kuala Lumpur.

This season she became the only woman to beat both reigning No.1s this year, beating Serena Williams at the Olympics and Angelique Kerber at the China Open.