![Coach Sam Sumyk and Donna Vekic of Croatia during practice ahead of the Roland-Garros 2021, Grand Slam tennis tournament, Qualifying, on May 27, 2021 at Roland-Garros stadium in Paris, France - Photo Coach Sam Sumyk and Donna Vekic of Croatia during practice ahead of the Roland-Garros 2021, Grand Slam tennis tournament, Qualifying, on May 27, 2021 at Roland-Garros stadium in Paris, France - Photo](https://c8.alamy.com/comp/2G03G8W/coach-sam-sumyk-and-donna-vekic-of-croatia-during-practice-ahead-of-the-roland-garros-2021-grand-slam-tennis-tournament-qualifying-on-may-27-2021-at-roland-garros-stadium-in-paris-france-photo-rob-prange-spain-dppi-dppi-livemedia-2G03G8W.jpg)
Coach Sam Sumyk and Donna Vekic of Croatia during practice ahead of the Roland-Garros 2021, Grand Slam tennis tournament, Qualifying, on May 27, 2021 at Roland-Garros stadium in Paris, France - Photo
![Live Tennis on Twitter: "Yet another on-court spat for Garbine #Muguruza & Sam Sumyk as defeat in Zhuhai ends the Spaniard's season. Will this spell the end for this coaching partnership? Read Live Tennis on Twitter: "Yet another on-court spat for Garbine #Muguruza & Sam Sumyk as defeat in Zhuhai ends the Spaniard's season. Will this spell the end for this coaching partnership? Read](https://pbs.twimg.com/media/DrGBu9YW4AQcvMZ.jpg)
Live Tennis on Twitter: "Yet another on-court spat for Garbine #Muguruza & Sam Sumyk as defeat in Zhuhai ends the Spaniard's season. Will this spell the end for this coaching partnership? Read
![Garbine Muguruza of Spain listens to coach Sam Sumyk at the 2019 Miami Open WTA Premier Mandatory tennis tournament Stock Photo - Alamy Garbine Muguruza of Spain listens to coach Sam Sumyk at the 2019 Miami Open WTA Premier Mandatory tennis tournament Stock Photo - Alamy](https://l450v.alamy.com/450v/2afp951/garbine-muguruza-of-spain-listens-to-coach-sam-sumyk-at-the-2019-miami-open-wta-premier-mandatory-tennis-tournament-2afp951.jpg)
Garbine Muguruza of Spain listens to coach Sam Sumyk at the 2019 Miami Open WTA Premier Mandatory tennis tournament Stock Photo - Alamy
![Coach Sam Sumyk's insights were of little use to defending China Open champion Garbine Muguruza (R), who fell in straight sets to the rampaging Petra Kvitova in Beijing; Getty Images | Tennismash Coach Sam Sumyk's insights were of little use to defending China Open champion Garbine Muguruza (R), who fell in straight sets to the rampaging Petra Kvitova in Beijing; Getty Images | Tennismash](https://tennismash.com/wp-content/uploads/2016/10/shots-06.jpg)
Coach Sam Sumyk's insights were of little use to defending China Open champion Garbine Muguruza (R), who fell in straight sets to the rampaging Petra Kvitova in Beijing; Getty Images | Tennismash
![WTA Insider on Twitter: "Donna Vekic and new coach Sam Sumyk hits the practice courts with Madison Keys. #RG20 https://t.co/xTOk3SnVwg" / Twitter WTA Insider on Twitter: "Donna Vekic and new coach Sam Sumyk hits the practice courts with Madison Keys. #RG20 https://t.co/xTOk3SnVwg" / Twitter](https://pbs.twimg.com/media/Ei2vLNrU8AELfqx.jpg)
WTA Insider on Twitter: "Donna Vekic and new coach Sam Sumyk hits the practice courts with Madison Keys. #RG20 https://t.co/xTOk3SnVwg" / Twitter
![Garbine Muguruza parts ways with her coach Sam Sumyk - Tennis Tonic - News, Predictions, H2H, Live Scores, stats Garbine Muguruza parts ways with her coach Sam Sumyk - Tennis Tonic - News, Predictions, H2H, Live Scores, stats](https://tennistonic.com/wp-content/uploads/2019/07/Muguruza-and-coach-Sam.jpg)