![WATCH: Daniil Medvedev, Stefanos Tsitsipas, Andrey Rublev and Others' Wild Celebration Following Their Win at Laver Cup 2021 - EssentiallySports WATCH: Daniil Medvedev, Stefanos Tsitsipas, Andrey Rublev and Others' Wild Celebration Following Their Win at Laver Cup 2021 - EssentiallySports](https://image-cdn.essentiallysports.com/wp-content/uploads/2021-09-26T194623Z_1617720667_MT1USATODAY16833922_RTRMADP_3_TENNIS-LAVER-CUP.jpg)
WATCH: Daniil Medvedev, Stefanos Tsitsipas, Andrey Rublev and Others' Wild Celebration Following Their Win at Laver Cup 2021 - EssentiallySports
![Laver Cup 2021: Team Europe with Roger Federer and Rafael Nadal lift trophy in 2019 after hat-trick of titles - Tennis video - Eurosport Laver Cup 2021: Team Europe with Roger Federer and Rafael Nadal lift trophy in 2019 after hat-trick of titles - Tennis video - Eurosport](https://i.eurosport.com/2019/09/22/2681830-55458910-2560-1440.jpg)
Laver Cup 2021: Team Europe with Roger Federer and Rafael Nadal lift trophy in 2019 after hat-trick of titles - Tennis video - Eurosport
![WATCH: Daniil Medvedev, Stefanos Tsitsipas, Andrey Rublev and Others' Wild Celebration Following Their Win at Laver Cup 2021 - EssentiallySports WATCH: Daniil Medvedev, Stefanos Tsitsipas, Andrey Rublev and Others' Wild Celebration Following Their Win at Laver Cup 2021 - EssentiallySports](https://i.ytimg.com/vi/_UVunhul8dk/maxresdefault.jpg)
WATCH: Daniil Medvedev, Stefanos Tsitsipas, Andrey Rublev and Others' Wild Celebration Following Their Win at Laver Cup 2021 - EssentiallySports
![Laver Cup matchups are set for Day 1, and John McEnroe's Team World has its work cut out - The Boston Globe Laver Cup matchups are set for Day 1, and John McEnroe's Team World has its work cut out - The Boston Globe](https://bostonglobe-prod.cdn.arcpublishing.com/resizer/1CKSsTzybz09mtYJZHe5_dZvmMU=/960x0/cloudfront-us-east-1.images.arcpublishing.com/bostonglobe/2P35WEHNIAYD6SNF63JSPGWM6A.jpg)
Laver Cup matchups are set for Day 1, and John McEnroe's Team World has its work cut out - The Boston Globe
![Team World's Felix Auger-Aliassime, of Canada, returns the ball to Team Europe's Matteo Berrettini, of Italy, at Laver Cup tennis, Friday, Sept. 24, 2021, in Boston. (AP Photo/Elise Amendola Stock Photo - Team World's Felix Auger-Aliassime, of Canada, returns the ball to Team Europe's Matteo Berrettini, of Italy, at Laver Cup tennis, Friday, Sept. 24, 2021, in Boston. (AP Photo/Elise Amendola Stock Photo -](https://c8.alamy.com/comp/2MDFMTK/team-worlds-felix-auger-aliassime-of-canada-returns-the-ball-to-team-europes-matteo-berrettini-of-italy-at-laver-cup-tennis-friday-sept-24-2021-in-boston-ap-photoelise-amendola-2MDFMTK.jpg)
Team World's Felix Auger-Aliassime, of Canada, returns the ball to Team Europe's Matteo Berrettini, of Italy, at Laver Cup tennis, Friday, Sept. 24, 2021, in Boston. (AP Photo/Elise Amendola Stock Photo -
![American men's tennis is in decline, and John McEnroe knows it: 'We don't do enough to promote our sport' - The Boston Globe American men's tennis is in decline, and John McEnroe knows it: 'We don't do enough to promote our sport' - The Boston Globe](https://cloudfront-us-east-1.images.arcpublishing.com/bostonglobe/VAQM6NHYSZKG7AUT4YAT7TPH2E.jpg)
American men's tennis is in decline, and John McEnroe knows it: 'We don't do enough to promote our sport' - The Boston Globe
![Team World's Felix Auger-Aliassime, of Canada, returns the ball to Team Europe's Matteo Berrettini, of Italy, at Laver Cup tennis, Friday, Sept. 24, 2021, in Boston. (AP Photo/Elise Amendola Stock Photo - Team World's Felix Auger-Aliassime, of Canada, returns the ball to Team Europe's Matteo Berrettini, of Italy, at Laver Cup tennis, Friday, Sept. 24, 2021, in Boston. (AP Photo/Elise Amendola Stock Photo -](https://c8.alamy.com/comp/2MDFMTR/team-worlds-felix-auger-aliassime-of-canada-returns-the-ball-to-team-europes-matteo-berrettini-of-italy-at-laver-cup-tennis-friday-sept-24-2021-in-boston-ap-photoelise-amendola-2MDFMTR.jpg)