RM2A8PGWALondon, Italy. 10th Nov, 2019. berettini during Nitto ATP Finals - Tennis Internationals - Credit: LPS/Roberto Zanettin/Alamy Live News
RM2A8PHPRLondon, Italy. 10th Nov, 2019. berettiniduring Nitto ATP Finals, Tennis Internationals in London, Italy, November 10 2019 - LPS/Roberto Zanettin Credit: Roberto Zanettin/LPS/ZUMA Wire/Alamy Live News
RM2A8RNYBLondon, UK. 10th Nov, 2019. Matteo Berrettini of Italy serves during the singles group match against Novak Djokovic of Serbia at the ATP World Tour Finals 2019 in London, Britain on Nov. 10, 2019. Credit: Han Yan/Xinhua/Alamy Live News
RM2A8PE5RLondon, UK. 10th Nov, 2019. Novak Djokovic of Serbia during his match against Berrettini of Italy on Day One of the Nitto ATP World Tour Finals at The O2 Arena on November 10, 2019 in London, England Credit: Independent Photo Agency/Alamy Live News
RM2A8NHFYLondon, UK. 10th Nov, 2019. Matteo BERRETTINI (Italy) during the Nitto ATP Tennis Finals London at The O2, London, England on 10 November 2019. Photo by Andy Rowland. Credit: PRiME Media Images/Alamy Live News
RM2A8PJ38London, Italy. 10th Nov, 2019. berettiniduring Nitto ATP Finals, Tennis Internationals in London, Italy, November 10 2019 - LPS/Roberto Zanettin Credit: Roberto Zanettin/LPS/ZUMA Wire/Alamy Live News
RM2A8RP07London, UK. 10th Nov, 2019. Novak Djokovic of Serbia serves during the singles group match against Matteo Berrettini of Italy at the ATP World Tour Finals 2019 in London, Britain on Nov. 10, 2019. Credit: Han Yan/Xinhua/Alamy Live News
RM2A8PE5XLondon, UK. 10th Nov, 2019. Novak Djokovic of Serbia during his match against Berrettini of Italy on Day One of the Nitto ATP World Tour Finals at The O2 Arena on November 10, 2019 in London, England Credit: Independent Photo Agency/Alamy Live News
RM2A8NHFPLondon, UK. 10th Nov, 2019. Matteo BERRETTINI (Italy) during the Nitto ATP Tennis Finals London at The O2, London, England on 10 November 2019. Photo by Andy Rowland. Credit: PRiME Media Images/Alamy Live News
RM2A8PGWHLondon, Italy. 10th Nov, 2019. berettini during Nitto ATP Finals - Tennis Internationals - Credit: LPS/Roberto Zanettin/Alamy Live News
RM2A8PK1KLondon, Italy. 10th Nov, 2019. djokovicduring Nitto ATP Finals, Tennis Internationals in London, Italy, November 10 2019 - LPS/Roberto Zanettin Credit: Roberto Zanettin/LPS/ZUMA Wire/Alamy Live News
RM2A8RP03London, UK. 10th Nov, 2019. Matteo Berrettini of Italy reacts during the singles group match against Novak Djokovic of Serbia at the ATP World Tour Finals 2019 in London, Britain on Nov. 10, 2019. Credit: Han Yan/Xinhua/Alamy Live News