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Doha, Qatar. 3rd Jan, 2017. Ivo Karlovic of Croatia returns a shot during a first round match against Illya Marchenko of Ukraine at the ATP Qatar Open tennis tournament in the Khalifa
![Doha, Qatar. 16th Feb, 2017. Caroline Wozniacki of Denmark celebrates after winning the women's singles 2nd round match against Agnieszka Radwanska of Poland at WTA Qatar Open 2017 at the International Khalifa Doha, Qatar. 16th Feb, 2017. Caroline Wozniacki of Denmark celebrates after winning the women's singles 2nd round match against Agnieszka Radwanska of Poland at WTA Qatar Open 2017 at the International Khalifa](https://c8.alamy.com/comp/HNT5CY/doha-qatar-16th-feb-2017-caroline-wozniacki-of-denmark-celebrates-HNT5CY.jpg)
Doha, Qatar. 16th Feb, 2017. Caroline Wozniacki of Denmark celebrates after winning the women's singles 2nd round match against Agnieszka Radwanska of Poland at WTA Qatar Open 2017 at the International Khalifa
![Novak Djokovic's final with Sir Andy Murray in Doha will have only made rival players fearing what is to come Novak Djokovic's final with Sir Andy Murray in Doha will have only made rival players fearing what is to come](https://www.telegraph.co.uk/content/dam/tennis/2017/01/08/murraydjoko_trans_NvBQzQNjv4BqhapkVlcy4J6MLIykjOByPh4RqWjmzAlTSu09VFjFdt4.jpg)