Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut with captain Richard Ruckelshausen during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut reacts after falling over during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut reacts after falling over during his group stage match against Austria's Dennis Novak REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut reacts during his group stage match against Austria's Dennis Novak REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak reacts during his group stage match against France's Nicolas Mahut REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut reacts during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut reacts to a line call during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak during his group stage match against France's Nicolas Mahut REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut with the team during a break in his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina TPX IMAGES OF THE DAY 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Nicolas Mahut in action during his group stage match against Austria's Dennis Novak REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Austria's Dennis Novak in action during his group stage match against France's Nicolas Mahut REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 France's Richard Ruckelshausen, Edouard Roger-Vasselin, Nicolas Mahut, Benoit Paire and Gael Monfils line up before the match between Austria's Dennis Novak and France's Nicolas Mahut REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 General view as the teams line up before the match between Austria's Dennis Novak and France's Nicolas Mahut REUTERS/Kelly Defina 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 France's Edouard Roger-Vasselin reacts during his group stage doubles match with Nicolas Mahut against Italy's Simone Bolelli and Andrea Vavassori REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 France's Nicolas Mahut reacts during his group stage doubles match with Edouard Roger-Vasselin against Italy's Simone Bolelli and Andrea Vavassori REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 France's Edouard Roger-Vasselin reacts during his group stage doubles match with Nicolas Mahut against Italy's Simone Bolelli and Andrea Vavassori REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 France's Nicolas Mahut in action during his group stage doubles match with Edouard Roger-Vasselin against Italy's Simone Bolelli and Andrea Vavassori REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 France's Nicolas Mahut in action during his group stage doubles match with Edouard Roger-Vasselin against Italy's Simone Bolelli and Andrea Vavassori REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 Italy's Simone Bolelli during his group stage doubles match with Andrea Vavassori against France's Nicolas Mahut and Edouard Roger-Vasselin REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 Italy's Simone Bolelli and Andrea Vavassori during their group stage doubles match against France's Nicolas Mahut and Edouard Roger-Vasselin REUTERS/Jaimi Joy 

Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 3, 2021 France's Nicolas Mahut and Edouard Roger-Vasselin during their group stage doubles match against Italy's Simone Bolelli and Andrea Vavassori REUTERS/Jaimi Joy 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Benoit Paire embraces a member of the Japan team after France's Nicolas Mahut and Pierre-Hugues Herbert win their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert shake hands with Japan's Yasutaka Uchiyama and Ben McLachlan after their doubles match REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert celebrate with Jo-Wilfried Tsonga and teammates after winning their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert celebrate after winning their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Sergio Perez 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert celebrate after winning their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Sergio Perez 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert celebrate after winning their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert during their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France captain Sebastien Grosjean reacts during the doubles match between France's Nicolas Mahut and Pierre-Hugues Herbert and Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 Japan's Yasutaka Uchiyama and Ben McLachlan during their doubles match against France's Nicolas Mahut and Pierre-Hugues Herbert REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert during their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert in action during their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert in action during their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 Japan's Yasutaka Uchiyama and Ben McLachlan during their doubles match against France's Nicolas Mahut and Pierre-Hugues Herbert REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert during their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert in action during their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - Davis Cup Finals - Caja Magica, Madrid, Spain - November 19, 2019 France's Nicolas Mahut and Pierre-Hugues Herbert in action during their doubles match against Japan's Yasutaka Uchiyama and Ben McLachlan REUTERS/Susana Vera 

Tennis - ATP Finals - The O2, London, Britain - November 17, 2019 France's Pierre-Hugues Herbert and Nicolas Mahut lift trophy as they celebrate winning their doubles final match against South Africa's Raven Klaasen and New Zealand's Michael Venus alongside the ATP Executive Chairman and President, Chris Kermode and President of Nitto, Hideo Takasaki Action Images via Reuters/Tony O'Brien 

Tennis - ATP Finals - The O2, London, Britain - November 17, 2019 France's Pierre-Hugues Herbert and Nicolas Mahut celebrate with fans after winning their doubles final match against South Africa's Raven Klaasen and New Zealand's Michael Venus Action Images via Reuters/Tony O'Brien 

Tennis - ATP Finals - The O2, London, Britain - November 17, 2019 France's Pierre-Hugues Herbert and Nicolas Mahut lift trophy as they celebrate winning their doubles final match against South Africa's Raven Klaasen and New Zealand's Michael Venus Action Images via Reuters/Tony O'Brien 

Tennis - ATP Finals - The O2, London, Britain - November 17, 2019 France's Pierre-Hugues Herbert and Nicolas Mahut celebrate winning their doubles final match against South Africa's Raven Klaasen and New Zealand's Michael Venus Action Images via Reuters/Tony O'Brien 

Tennis - ATP Finals - The O2, London, Britain - November 17, 2019 France's Pierre-Hugues Herbert and Nicolas Mahut kiss trophy as they celebrate winning their doubles final match against South Africa's Raven Klaasen and New Zealand's Michael Venus REUTERS/Peter Nicholls 

Tennis - ATP Finals - The O2, London, Britain - November 17, 2019 South Africa's Raven Klaasen and New Zealand's Michael Venus in action during their doubles final match against France's Pierre-Hugues Herbert and Nicolas Mahut Action Images via Reuters/Tony O'Brien