Mate Pavic and Borna Coric enjoy participating in a football match at a Marin Cilic Foundation event.

Marin Cilic enjoys a day of football with students at Tordinci Elementary School, where his foundation funded a playground.

Roger Federer and Rafael Nadal play the Match in Africa 6 in front of a record crowd inside South Africa's Cape Town Stadium.

Roger Federer, Nick Kyrgios, Naomi Osaka, Alexander Zverev, Dominic Thiem, Serena Williams, Caroline Wozniacki, Petra Kvitova, Coco Gauff, Novak Djokovic, Stefanos Tsitsipas and Rafael Nadal take part in Rally For Relief on Wednesday night.

Bob Bryan, Tommy Haas, Mark Knowles, Arantxa Sanchez Vicario, Andy Roddick, Coco Gauff and James Blake come together to raise funds for Hurricane Dorian relief efforts at the Baha Mar Cup.

Footballer Luka Modric and Marin Cilic entertain the crowd at Cilic's charity event.

The Andy Roddick Foundation has raised more than $20 million since 2000.

Hans Podlipnik-Castillo spends time with children of Futuros para el Tenis in September 2018.

Sebastien Grosjean, Tennys Sandgren, Michael Kosta, Kevin Anderson, Shelby Rogers and Eugenie Bouchard help raise money at Kevin Anderson's Grand Slam Cause for the Paws.

Tennys Sandgren, Kevin Anderson, Bob Bryan and Mike Bryan help raise more than $100,000 for charity.

Nick Kyrgios meets Loga Gandhi, her father Pari Gandhi, mother Sankari Kalaiselvan and brother Aylione Gandhi in Canberra on Saturday.

Top seed Juan Martin del Potro, a contender for the Nitto ATP Finals, attends a China Open charity event in Beijing.

Andy Roddick participates in the Dirk Nowitzki Pro Celebrity Tennis Classic for the third consecutive year.

Former ATP World Tour players Andy Roddick, Mark Knowles, Tommy Haas and Taylor Dent, along with current player Mitchell Krueger, help Dirk Nowitzki raise money for his foundation.

Jamie Cerretani joins Leander Paes in speaking with local children during the ATP Tour 250 event in Newport in 2018.

#NextGenATP Canadian Denis Shapovalov and Hungarian Zsombor Piros assist at kids' day at the Gazprom Hungarian Open on Wednesday.

David Massey (centre), Executive Vice President of ATP Europe, presents an ATP ACES for Charity cheque to Academia Champs founder Antonio Champalimaud and Tournament Director Joao Zilhao in Estoril.

Roger Federer works with local partners in Zambia and elsewhere around the world to improve children's lives.

ATP World Tour veteran Aisam-Ul-Haq Qureshi makes time to give back in Uganda through his 'Stop War Start Tennis' foundation.

Boston Celtics star Gordan Hayward and Australian Nick Kyrgios spend time with players from the Stoneman Douglas High School tennis teams on Sunday at Crandon Park.

Academia Dos Champs has held over 10,000 tennis lessons since 2009 and the 2018 ATP Aces for Charity grant will fund over 1,100 more.

Horia Tecau uses his book,'Viata in ritm de Tenis', which in English is 'Life in the Rhythm of Tennis' to teach kids about honesty, teamwork, adherence to rules and more.

A number of ATP World Tour players, including Andy Murray, centre, to the left of Jack Nicklaus, participated in the "Fore Love" tournament.

The inaugural "Fore Love Tournament" raised more than $1 million. From left to right: Andy Murray, Jack Nicklaus, Bob Bryan, Mike Bryan and Serena Williams.