![Roberto Carballes Baena of Spain serves during the St. Petersburg Open ATP tennis tournament match against Martin Klizan of Slovakia, in St.Petersburg, Russia, Tuesday, Sept. 17, 2019. (AP Photo/Dmitry Lovetsky Stock Photo - Roberto Carballes Baena of Spain serves during the St. Petersburg Open ATP tennis tournament match against Martin Klizan of Slovakia, in St.Petersburg, Russia, Tuesday, Sept. 17, 2019. (AP Photo/Dmitry Lovetsky Stock Photo -](https://c8.alamy.com/comp/2MJ5B88/roberto-carballes-baena-of-spain-serves-during-the-st-petersburg-open-atp-tennis-tournament-match-against-martin-klizan-of-slovakia-in-stpetersburg-russia-tuesday-sept-17-2019-ap-photodmitry-lovetsky-2MJ5B88.jpg)
Roberto Carballes Baena of Spain serves during the St. Petersburg Open ATP tennis tournament match against Martin Klizan of Slovakia, in St.Petersburg, Russia, Tuesday, Sept. 17, 2019. (AP Photo/Dmitry Lovetsky Stock Photo -
![ATP Tour: Qualifier Martin Klizan claims second career title at BMW Open in Germany | Tennis News | Sky Sports ATP Tour: Qualifier Martin Klizan claims second career title at BMW Open in Germany | Tennis News | Sky Sports](https://e0.365dm.com/14/05/768x432/Martin-Klizan_3135777.jpg?20140504155858)
ATP Tour: Qualifier Martin Klizan claims second career title at BMW Open in Germany | Tennis News | Sky Sports
![Novak Djokovic of Serbia waves after winning a match against Martin Klizan of Slovak in the ATP World Tour Masters 1000 Shanghai in Shanghai, China Wednesday Oct. 14, 2015. Djokovic won the Novak Djokovic of Serbia waves after winning a match against Martin Klizan of Slovak in the ATP World Tour Masters 1000 Shanghai in Shanghai, China Wednesday Oct. 14, 2015. Djokovic won the](https://c8.alamy.com/comp/2P29NCM/novak-djokovic-of-serbia-waves-after-winning-a-match-against-martin-klizan-of-slovak-in-the-atp-world-tour-masters-1000-shanghai-in-shanghai-china-wednesday-oct-14-2015-djokovic-won-the-match-2-0chinatopix-via-ap-china-out-2P29NCM.jpg)
Novak Djokovic of Serbia waves after winning a match against Martin Klizan of Slovak in the ATP World Tour Masters 1000 Shanghai in Shanghai, China Wednesday Oct. 14, 2015. Djokovic won the
![Kitzbuhel Open: Qualifier Martin Klizan defeats Denis Istomin in straight sets to clinch sixth ATP title-Sports News , Firstpost Kitzbuhel Open: Qualifier Martin Klizan defeats Denis Istomin in straight sets to clinch sixth ATP title-Sports News , Firstpost](https://images.firstpost.com/wp-content/uploads/2018/08/Klizan-Instagram-380.jpg?impolicy=website&width=1200&height=900)