TENNIS PHOTOS

  • (FILES) In this file photo taken on October 27, 2018 Russia's Daniil Medvedev returns a ball to Switzerland's Roger Federer during their semi final match at the Swiss Indoors ATP 500 tennis tournament in Basel. - Alexander Zverev of Germany said after his win in the ATP tournament in London that a crop of top young players was on the march, desperate to end the stranglehold on the sport exerted by Djokovic, Federer, Rafael Nadal and Andy Murray in recent years. (Photo by Fabrice COFFRINI / AFP)FABRICE COFFRINI/AFP/Getty Images

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  • (FILES) In this file photo taken on November 01, 2018 Croatia's Borna Coric returns the ball to Austria's Dominic Thiem during their men's singles third round tennis match on day four of the ATP World Tour Masters 1000 - Rolex Paris Masters - indoor tennis tournament at The AccorHotels Arena in Paris. - Alexander Zverev of Germany said after his win in the ATP tournament in London that a crop of top young players was on the march, desperate to end the stranglehold on the sport exerted by Djokovic, Federer, Rafael Nadal and Andy Murray in recent years. (Photo by Anne-Christine POUJOULAT / AFP)ANNE-CHRISTINE POUJOULAT/AFP/Getty Images

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  • (FILES) In this file photo taken on November 10, 2018 Greece's Stefanos Tsitsipas returns to Australia's Alex De Minaur during the men's final of the Next Generation ATP Finals in Milan. - Alexander Zverev of Germany said after his win in the ATP tournament in London that a crop of top young players was on the march, desperate to end the stranglehold on the sport exerted by Djokovic, Federer, Rafael Nadal and Andy Murray in recent years. (Photo by Miguel MEDINA / AFP)MIGUEL MEDINA/AFP/Getty Images

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  • (FILES) In this file photo taken on November 04, 2018 Russia's Karen Khachanov returns the ball to Serbia's Novak Djokovic during their men's singles final tennis match on day seven of the ATP World Tour Masters 1000 - Rolex Paris Masters - indoor tennis tournament at The AccorHotels Arena in Paris. - Alexander Zverev of Germany said after his win in the ATP tournament in London that a crop of top young players was on the march, desperate to end the stranglehold on the sport exerted by Djokovic, Federer, Rafael Nadal and Andy Murray in recent years. (Photo by Anne-Christine POUJOULAT / AFP)ANNE-CHRISTINE POUJOULAT/AFP/Getty Images

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  • (FILES) In this file photo taken on October 29, 2018 Canada's Denis Shapovalov returns the ball to France's Richard Gasquet during their men's singles first round tennis match on day one of the ATP World Tour Masters 1000 - Rolex Paris Masters - indoor tennis tournament at The AccorHotels Arena in Paris. - Alexander Zverev of Germany said after his win in the ATP tournament in London that a crop of top young players was on the march, desperate to end the stranglehold on the sport exerted by Djokovic, Federer, Rafael Nadal and Andy Murray in recent years. (Photo by Anne-Christine POUJOULAT / AFP)ANNE-CHRISTINE POUJOULAT/AFP/Getty Images

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  • Alexander Zverev of Germany rests on the court after winning match point against Novak Djokovic of Serbia in their ATP World Tour Finals singles final tennis match at the O2 Arena in London, Sunday Nov. 18, 2018. (AP Photo/Tim Ireland)

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  • LONDON, ENGLAND - NOVEMBER 18:: Alexander Zverev of Germany celebrates victory with the trophy following the singles final against Novak Djokovic of Serbia during Day Eight of the Nitto ATP Finals at The O2 Arena on November 18, 2018 in London, England. (Photo by Clive Brunskill/Getty Images)

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  • LONDON, ENGLAND - NOVEMBER 18: Alexander Zverev of Germany celebrates with the ball kids after the singles final against Novak Djokovic of Serbia during Day Eight of the Nitto ATP Finals at The O2 Arena on November 18, 2018 in London, England. (Photo by Julian Finney/Getty Images)

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  • LONDON, ENGLAND - NOVEMBER 18: Novak Djokovic of Serbia plays a backhand volley in the final against Alexander Zverev of Germany during Day Eight of the Nitto ATP Finals at The O2 Arena on November 18, 2018 in London, England. (Photo by Julian Finney/Getty Images)

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  • LONDON, ENGLAND - NOVEMBER 18: Novak Djokovic of Serbia stretches for a backhand in the final against Alexander Zverev of Germany during Day Eight of the Nitto ATP Finals at The O2 Arena on November 18, 2018 in London, England. (Photo by Julian Finney/Getty Images)

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