![Mona Berthel, from Germany returns a shot during her quarter final match against Elise Mertens, from Belgium, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo Mona Berthel, from Germany returns a shot during her quarter final match against Elise Mertens, from Belgium, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo](https://c8.alamy.com/comp/2NX9MNG/mona-berthel-from-germany-returns-a-shot-during-her-quarter-final-match-against-elise-mertens-from-belgium-as-part-of-the-wta-tennis-tournament-in-lugano-switzerland-saturday-april-14-2018-pablo-gianinazziti-presskeystone-via-ap-2NX9MNG.jpg)
Mona Berthel, from Germany returns a shot during her quarter final match against Elise Mertens, from Belgium, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo
![Elise Mertens, from Belgium, returns a shot during her quarter final match against Mona Berthel, from Germany, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo Elise Mertens, from Belgium, returns a shot during her quarter final match against Mona Berthel, from Germany, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo](https://l450v.alamy.com/450v/2nx9r45/elise-mertens-from-belgium-returns-a-shot-during-the-wta-tennis-tournament-in-lugano-switzerland-friday-april-13-2018-pablo-gianinazziti-presskeystone-via-ap-2nx9r45.jpg)
Elise Mertens, from Belgium, returns a shot during her quarter final match against Mona Berthel, from Germany, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo
![Vera Lapko, from Belarus, returns a shot during her semi final match against Elise Mertens, from Belgium, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo Vera Lapko, from Belarus, returns a shot during her semi final match against Elise Mertens, from Belgium, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo](https://c8.alamy.com/comp/2NX9MJJ/vera-lapko-from-belarus-returns-a-shot-during-her-semi-final-match-against-elise-mertens-from-belgium-as-part-of-the-wta-tennis-tournament-in-lugano-switzerland-saturday-april-14-2018-pablo-gianinazziti-presskeystone-via-ap-2NX9MJJ.jpg)
Vera Lapko, from Belarus, returns a shot during her semi final match against Elise Mertens, from Belgium, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo
![Elise Mertens, from Belgium, returns a shot during her quarter final match against Mona Berthel, from Germany, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo Elise Mertens, from Belgium, returns a shot during her quarter final match against Mona Berthel, from Germany, as part of the WTA tennis tournament in Lugano, Switzerland, Saturday, April 14, 2018. (Pablo](https://c8.alamy.com/comp/2NX9MMY/elise-mertens-from-belgium-returns-a-shot-during-her-quarter-final-match-against-mona-berthel-from-germany-as-part-of-the-wta-tennis-tournament-in-lugano-switzerland-saturday-april-14-2018-pablo-gianinazziti-presskeystone-via-ap-2NX9MMY.jpg)