It was an emotional night in Buenos Aires on Sunday as Novak Djokovic helped Juan Martin del Potro say goodbye to his tennis career. The Argentine tennis star beat the 24-time Major winner in his final match and both men immediately broke down in tears.

Juan Martin del Potro ended his career on Sunday. The 2009 US Open champion played an exhibition match against his great friend Novak Djokovic in Buenos Aires. They enjoyed every minute on the court,

Former US Open champion Juan Martin del Potro emotionally retired from tennis after an exhibition match against Novak Djokovic in Argentina. The 36-year-old, who won his only major title in 2009, faced numerous injuries throughout his career,

Novak Djokovic left Juan Martin del Potro and the Argentine fans delighted as he granted the former No. 3’s unusual request during an exhibition match. Del Potro said farewell to tennis with one last outing against Djokovic in Buenos Aires, in a contest dubbed ‘The Last Challenge’.

Novak Djokovic and Roger Federer both paid tribute to Juan Martin del Potro at an emotional farewell match in Buenos Aires.

Juan Martin del Potro bid farewell after beating Novak Djokovic 6-4, 7-5 in an emotional exhibition match in front of his home crowd in Buenos Aires, Argentina on Sunday.

Juan Martin del Potro left fans in awe after clinching the El Ultimo Desafio win in Beuno Aires against Novak Djokovic.

Juan del Potro is set to play Novak Djokovic in a "goodbye" exhibition match as he opened up about the extent of his "endless injury nightmare".

Novak Djokovic spoke about his rivalry and friendship with Juan Martin del Potro over the 17 years on tour ahead of the Buenos Aires exhibition match. Speaking to the media, the Serb dubbed the 36-year-old Argentine's career among the greatest and acknowledged the various injuries that hampered his progress.

Here are 5 wholesome moments that explain why Juan Martin del Potro picked Novak Djokovic as his opponent for the “El Ultimo Desafio”.

Novak Djokovic has admitted he is “sad” that most of his long-term rivals have retired from tennis. The 24-time Grand Slam winner namechecked Andy Murray, Roger Federer and Rafael Nadal before appearing in an exhibition match in Buenos Aires to mark Juan Martin del Potro’s retirement.