Twelve-time Grand Slam winner Novak Djokovic has parted company with his entire coaching team, including Marian Vajda, who has been with him through almost all of his career.
Djokovic believes this "shock therapy" will help him achieve better results.
The world number two says he will be on the tour alone until he finds the right person to take over as head coach.
Boris Becker, himself a six-time Grand Slam winner, left after three years as Djokovic's coach in December.
The Serb next competes at the Madrid Open, with the men's first-round draw to take place on Friday afternoon.