World No.18 Julia Goerges has announced via social media that she has appointed Sebastian Sachs as her new coach, following over three years working with Michael Geserer.

"Hello everyone," Goerges opened, in a Twitter post on Wednesday. "I would like to thank Michael for his hard work over the past 3.5 years. Together we have had a very successful partnership and my game has developed positively. Now it is time to take a new path and make my next steps forward.

"Sebastian Sachs will be my new coach and I look forward to what is ahead. Thank you all for your continued support!"

2018 was a blockbuster year for Goerges, as she won singles titles in Auckland and Luxembourg, reached her first Grand Slam semifinal at Wimbledon, and made her Top 10 debut, peaking at World No.9 on August 20. She finished the last two years at World No.14, the best year-end rankings of her career.

This year started with a bang as well, as the No.2 German defended her Auckland championship for her seventh career title, defeating rapidly rising teenager Bianca Andreescu in the final. Goerges also picked up two Top 10 wins during the year thus far, over Caroline Wozniacki in Auckland and Karolina Pliskova in the Fed Cup.

Read more: French Open 2019, Day 2 roundup: Konta moves past Lottner, Kanepi stuns Goerges

But the clay-court season has been less successful for Goerges, going just 1-5 on the surface, with two retirements as she struggled with ailments. Goerges retired during her first-round match in Stuttgart with a neck injury, and stopped her second-round tilt in Rome due to a right thigh injury.

The right thigh injury caused Goerges to withdraw from Nurnberg the week before the French Open. On Sunday, she lost in the first round at Roland Garros, falling to two-time quarterfinalist and former World No.15 Kaia Kanepi, 7-5, 6-1.