World No. 1 Iga Swiatek has split with coach Tomasz Wiktorowski after three highly successful years together.

Swiatek won four of her five Grand Slam titles under Wiktorowski and 19 of her 22 career titles.

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

“I want to start with a big thank you and appreciating our work together.”

Wiktorowski was voted the WTA’s Coach of the Year in 2023.

“Coach Wiktorowski joined my team for three seasons, when I strongly needed changes and a fresh approach to my game,” added Swiatek.

“His experience, analytical and strategic attitude and enormous knowledge about tennis helped us to achieve things I’ve never dreamed of only a few months after we started working together.

“Our main goal was to become No. 1 player in the world and coach Wiktorowski was the one who said it first. We aimed very high, we headed to every tournament with a clear goal to win it. Together with coach Wiktorowski we won many tournaments and four Grand Slams.”

Swiatek has not played since losing in the quarter-finals of the US Open.

“Due to this important change on my team, I give myself a couple of weeks to start a cooperation with a new coach.

“I’m in the middle of first talks with coaches from abroad (non-Polish) because I’m ready to take the next step of my career. I will let you know when I make a decision.”

Swiatek has pulled out of the WTA 1000 Wuhan Open next week.

A statement from the tournament said: “Unfortunately Iga Swiatek will not play in Wuhan this year.

“She is taking some time after making changes in her team.”

Swiatek is unlikely to play again until the season-ending WTA Finals, which starts on November 2.