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Madrid, Spain, May 13, 2018. 13th May, 2018. Alexander Zverev (GER) Tennis : Alexander Zverev of Germany during singles final round match against Dominic Thiem of Austria on the ATP World Tour
![Firstpost Explains: Rules and format of ATP World Tour and Next Gen Finals ahead of season-ending tournaments-Sports News , Firstpost Firstpost Explains: Rules and format of ATP World Tour and Next Gen Finals ahead of season-ending tournaments-Sports News , Firstpost](https://images.firstpost.com/wp-content/uploads/2018/11/Next-Gen-Finals-380.jpg?impolicy=website&width=1200&height=800)
Firstpost Explains: Rules and format of ATP World Tour and Next Gen Finals ahead of season-ending tournaments-Sports News , Firstpost
![Hamburg, Germany. 27th July, 2018. Tennis ATP-Tour German Open, quarter finals, singles, men, in the tennis stadium at Rothenbaum. Monteiro (Brazil) - Kovalik (Slovakia). Jozef Kovalik during the match. Credit: Daniel Bockwoldt/dpa/Alamy Hamburg, Germany. 27th July, 2018. Tennis ATP-Tour German Open, quarter finals, singles, men, in the tennis stadium at Rothenbaum. Monteiro (Brazil) - Kovalik (Slovakia). Jozef Kovalik during the match. Credit: Daniel Bockwoldt/dpa/Alamy](https://c8.alamy.com/comp/PB8TK4/hamburg-germany-27th-july-2018-tennis-atp-tour-german-open-quarter-finals-singles-men-in-the-tennis-stadium-at-rothenbaum-monteiro-brazil-kovalik-slovakia-jozef-kovalik-during-the-match-credit-daniel-bockwoldtdpaalamy-live-news-PB8TK4.jpg)
Hamburg, Germany. 27th July, 2018. Tennis ATP-Tour German Open, quarter finals, singles, men, in the tennis stadium at Rothenbaum. Monteiro (Brazil) - Kovalik (Slovakia). Jozef Kovalik during the match. Credit: Daniel Bockwoldt/dpa/Alamy
![FILE--Li Na plays tennis at Chengdu ATP Tour 250 tournament in Chengdu city, southwest China's Sichuan province, 27 October 2018. Li Na, a retired Chinese tennis player, shows up at Chengdu ATP FILE--Li Na plays tennis at Chengdu ATP Tour 250 tournament in Chengdu city, southwest China's Sichuan province, 27 October 2018. Li Na, a retired Chinese tennis player, shows up at Chengdu ATP](https://c8.alamy.com/comp/2ET9CP5/file-li-na-plays-tennis-at-chengdu-atp-tour-250-tournament-in-chengdu-city-southwest-chinas-sichuan-province-27-october-2018-li-na-a-retired-chinese-tennis-player-shows-up-at-chengdu-atp-tour-250-tournament-and-interact-with-attended-fans-in-chengdu-city-southwest-chinas-sichuan-province-27-october-2018-photo-by-zhang-yunke-imaginechsipa-usa-2ET9CP5.jpg)
FILE--Li Na plays tennis at Chengdu ATP Tour 250 tournament in Chengdu city, southwest China's Sichuan province, 27 October 2018. Li Na, a retired Chinese tennis player, shows up at Chengdu ATP
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