Tomas Berdych has split with coach Daniel Vallverdu just ahead of this month's French Open due to his disappointing results in the recent past.
The 30-year-old Berdych is yet to reach a single final this season and has already lost 10 times, including a disappointing second-round loss to world number 71 Damir Dzumhur in the Monaco Masters.
World number eight Berdych, who started working with the former coach of world number two Andy Murray in December 2014, said in a Facebook post he was yet to decide on his new coach.
"My results lately have not been what I expected. As I am not a tennis player at the beginning of his career I have to act quickly when I feel that I need a change." Berdych said.
Berdych is currently training in Paris and with the second grand slam of the year starting in Roland Garros next week.