Rafael Nadal could face Novak Djokovic in a heavyweight second-round match at the Paris Olympic Games after the draws for the tennis tournaments were made on Thursday.
Nadal is widely expected to retire from tennis later this year, with the Olympics set to represent his swansong at Roland-Garros, where he has won 14 French Open titles.
He will play in both the singles and doubles tournaments, partnering current French Open and Wimbledon champion Carlos Alcaraz for the latter competition.
Nadal and Alcaraz will face Argentina's fourth-seeded pair Maximo Gonzalez and Andres Molteni in a difficult first-round matchup in the doubles tournament.
Nadal is one of just two players to have won Olympic gold in both singles and doubles since the sport returned to the Games in 1988, doing so at Beijing 2008 (singles) and Rio 2016 (doubles) – Nicolas Massu triumphed over both events at Athens 2004.
In the singles, Nadal will take on Hungary's Marton Fucsovics in the opening round, and the prize could be a second-round date with Djokovic, who faces Australian Matthew Ebden first.
They are on the same side of the draw as third seed Alexander Zverev, who faces Jaume Munar first, and seventh seed Taylor Fritz, who opens against Alexander Bublik.
On the opposite side of the bracket, Alcaraz will start his campaign against Hady Habib, with Britain's Cameron Norrie a potential second-round opponent.
Fourth seed Daniil Medvedev faces Rinky Hijikata in his first match, while fifth seed Alex de Minaur is a potential quarter-final opponent for Alcaraz.
Britain's Andy Murray withdrew from the singles event to concentrate on his doubles bid alongside Dan Evans on Thursday, and the duo will face Kei Nishikori and Taro Daniel of Japan first.
Should they advance, home favourites Arthur Fils and Ugo Humbert could await in round two, with Taylor Fritz and Tommy Paul potential quarter-final foes, though the Americans will have to overcome Canada's Milos Raonic and Felix Auger Aliassime to get that far.
Murray and Evans cannot face Nadal and Alcaraz until the final.
Iga Swiatek is the strong favourite in the women's draw, having won four French Open titles on the Paris clay. Romania's Irina-Camelia Begu is her round-one opponent.
On her same side of the draw, there is a huge round-one clash between Naomi Osaka and 2016 silver medallist Angelique Kerber, who announced on Thursday that she will retire after the Games.
Elena Rybakina and Danielle Collins are also on that side of the draw, while Coco Gauff starts against Ajla Tomljanovic on the opposite side of the bracket.