![Karolina Pliskova of the Czech Republic in action during the semi-final at the 2021 Western & Southern Open WTA 1000 tennis tournament against Jil Teichmann of Switzerland on August 21, 2021 at Karolina Pliskova of the Czech Republic in action during the semi-final at the 2021 Western & Southern Open WTA 1000 tennis tournament against Jil Teichmann of Switzerland on August 21, 2021 at](https://c8.alamy.com/comp/2GEYMTB/karolina-pliskova-of-the-czech-republic-in-action-during-the-semi-final-at-the-2021-western-southern-open-wta-1000-tennis-tournament-against-jil-teichmann-of-switzerland-on-august-21-2021-at-lindner-family-tennis-center-in-cincinnati-usa-photo-rob-prange-spain-dppi-dppi-2GEYMTB.jpg)
Karolina Pliskova of the Czech Republic in action during the semi-final at the 2021 Western & Southern Open WTA 1000 tennis tournament against Jil Teichmann of Switzerland on August 21, 2021 at
![Jil Teichmann of Switzerland in action during her third round match at the 2021 Western & Southern Open WTA 1000 tennis tournament against Naomi Osaka of Japan on August 19, 2021 at Jil Teichmann of Switzerland in action during her third round match at the 2021 Western & Southern Open WTA 1000 tennis tournament against Naomi Osaka of Japan on August 19, 2021 at](https://c8.alamy.com/comp/2GEYF5M/jil-teichmann-of-switzerland-in-action-during-her-third-round-match-at-the-2021-western-southern-open-wta-1000-tennis-tournament-against-naomi-osaka-of-japan-on-august-19-2021-at-lindner-family-tennis-center-in-cincinnati-usa-photo-rob-prange-spain-dppi-dppi-2GEYF5M.jpg)
Jil Teichmann of Switzerland in action during her third round match at the 2021 Western & Southern Open WTA 1000 tennis tournament against Naomi Osaka of Japan on August 19, 2021 at
Jil Teichmann of Switzerland serves during her match against Belinda... Nachrichtenfoto - Getty Images
![Jil Teichmann of Switzerland after winning her semi final at the 2021 Western & Southern Open WTA 1000 tennis tournament against Karolina Pliskova of the Czech Republic on August 21, 2021 at Jil Teichmann of Switzerland after winning her semi final at the 2021 Western & Southern Open WTA 1000 tennis tournament against Karolina Pliskova of the Czech Republic on August 21, 2021 at](https://c8.alamy.com/comp/2GEYMTE/jil-teichmann-of-switzerland-after-winning-her-semi-final-at-the-2021-western-southern-open-wta-1000-tennis-tournament-against-karolina-pliskova-of-the-czech-republic-on-august-21-2021-at-lindner-family-tennis-center-in-cincinnati-usa-photo-rob-prange-spain-dppi-dppi-2GEYMTE.jpg)
Jil Teichmann of Switzerland after winning her semi final at the 2021 Western & Southern Open WTA 1000 tennis tournament against Karolina Pliskova of the Czech Republic on August 21, 2021 at
![US Open: Naomi Osaka shocked by Swiss wild card Jil Teichmann at Cincinnati warm-up | South China Morning Post US Open: Naomi Osaka shocked by Swiss wild card Jil Teichmann at Cincinnati warm-up | South China Morning Post](https://img.i-scmp.com/cdn-cgi/image/fit=contain,width=1098,format=auto/sites/default/files/styles/1200x800/public/d8/images/methode/2021/08/20/8a2a706a-0177-11ec-83d9-2f907cc4e7e5_image_hires_133513.jpg?itok=L8R0cn7f&v=1629437722)
US Open: Naomi Osaka shocked by Swiss wild card Jil Teichmann at Cincinnati warm-up | South China Morning Post
![Belinda Bencic of Switzerland in action during the first round of the 2021 Western & Southern Open WTA 1000 tennis tournament against Marketa Vondrousova of the Czech Republic on August 17, 2021 Belinda Bencic of Switzerland in action during the first round of the 2021 Western & Southern Open WTA 1000 tennis tournament against Marketa Vondrousova of the Czech Republic on August 17, 2021](https://c8.alamy.com/comp/2GEAX08/belinda-bencic-of-switzerland-in-action-during-the-first-round-of-the-2021-western-southern-open-wta-1000-tennis-tournament-against-marketa-vondrousova-of-the-czech-republic-on-august-17-2021-at-lindner-family-tennis-center-in-cincinnati-usa-photo-rob-prange-spain-dppi-dppi-credit-independent-photo-agencyalamy-live-news-2GEAX08.jpg)
Belinda Bencic of Switzerland in action during the first round of the 2021 Western & Southern Open WTA 1000 tennis tournament against Marketa Vondrousova of the Czech Republic on August 17, 2021
Novak Djokovic of Serbia serves against Roger Federer of Switzerland... Nachrichtenfoto - Getty Images
![CINCINNATI, OH - AUGUST 17: Roger Federer of Switzerland celebrates after winning the final against David Ferrer of Spain on… | Roger federer, Tennis events, Tennis CINCINNATI, OH - AUGUST 17: Roger Federer of Switzerland celebrates after winning the final against David Ferrer of Spain on… | Roger federer, Tennis events, Tennis](https://i.pinimg.com/originals/58/f9/ba/58f9ba398c3bcf36cc6964a1c5f850a0.jpg)
CINCINNATI, OH - AUGUST 17: Roger Federer of Switzerland celebrates after winning the final against David Ferrer of Spain on… | Roger federer, Tennis events, Tennis
![Jil Teichmann of Switzerland in action during her third round match at the 2021 Western & Southern Open WTA 1000 tennis tournament against Naomi Osaka of Japan on August 19, 2021 at Jil Teichmann of Switzerland in action during her third round match at the 2021 Western & Southern Open WTA 1000 tennis tournament against Naomi Osaka of Japan on August 19, 2021 at](https://c8.alamy.com/comp/2GEYD37/jil-teichmann-of-switzerland-in-action-during-her-third-round-match-at-the-2021-western-southern-open-wta-1000-tennis-tournament-against-naomi-osaka-of-japan-on-august-19-2021-at-lindner-family-tennis-center-in-cincinnati-usa-photo-rob-prange-spain-dppi-dppi-2GEYD37.jpg)