Two-time defending champion Rafael Nadal defeated Dominic Thiem in a rematch of the 2018 final, 6–3, 5–7, 6–1, 6–1 to win the Men's Singles tennis title at the 2019 French Open. It was played on the 9th June, 2019. It was Nadal's record-extending twelfth French Openmen's singles title. By winning the title, Nadal broke the all-time record for the most singles titles won by a player at the same Grand Slam tournament – a record he previously co-held with Margaret Court, who won the Australian Open eleven times. Novak Djokovic and Roger Federer were both attempting to achieve the first doubleCareer Grand Slam in men's singles in the Open Era, with Djokovic also in contention to hold all four of the Grand Slam titles at the same time, but in the semifinals, Djokovic lost to Thiem and Federer lost to Nadal. This was Federer's first time playing the French Open in four years. Nadal and Federer both reached the fourth round for the fourteenth time. Federer's third round match marked his 400th match in a Grand Slam tournament, an all-time record. Federer also became the oldest male singles player to reach the fourth round at Roland Garros since Nicola Pietrangeli in 1972, as well as the oldest semifinalist since the 40 year-old Pancho Gonzales in 1968. The first round match between Ivo Karlović and Feliciano López was the oldest French Open men's singles match in terms of combined ages in the Open Era. Karlović is the oldest male singles player to compete in the tournament since István Gulyás in 1973. Stefanos Tsitsipas became the first Greek player to reach the round of 16 at Roland Garros since Lazaros Stalios in 1936. For only the third time in the Open Era and the first time since the 1970 Australian Open, all of the top 10 seeds reached the round of 16 at a Grand Slam men's singles tournament. It is also the first time since the 2013 Australian Open that all top four seeds reached the semifinals. It was the first time since the 2012 French Open that the Big Three all reached the semifinals of a Grand Slam tournament.
