| Men's doubles | |
|---|---|
| 2021 Nottingham Trophy | |
| Champions |  Marc Polmans Matt Reid |
| Runners-up |  Benjamin Bonzi Antoine Hoang |
| Final score | 6–4, 4–6, [10–8] |
Chris Guccione and Rajeev Ram were the defending champions [1] but chose not to defend their title.
Marc Polmans and Matt Reid won the title after defeating Benjamin Bonzi and Antoine Hoang 6–4, 4–6, [10–8] in the final.
Matthew Ebden / 
Andrei Vasilevski (semifinals)
Nathaniel Lammons / Jackson Withrow (quarterfinals) Marc Polmans / Matt Reid (champions) Benjamin Bonzi / Antoine Hoang (final)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | M Ebden A Vasilevski | 6 | 77 | ||||||||||||||||||||||||
| WC |  B Gojo  A Matusevich | 79 | 7 | WC | B Gojo A Matusevich | 3 | 63 | ||||||||||||||||||||
| L Johnson A McHugh | 67 | 5 | 1 | M Ebden A Vasilevski | 2 | 6 | [11] | ||||||||||||||||||||
| 4 | B Bonzi A Hoang | 77 | 6 | 4 | B Bonzi A Hoang | 6 | 3 | [13] | |||||||||||||||||||
 L Mayer  T Seyboth Wild | 62 | 2 | 4 | B Bonzi A Hoang | 6 | 6 | |||||||||||||||||||||
M Cressy  R Ramanathan | 3 | 64 |  E Donskoy  K Majchrzak | 1 | 2 | ||||||||||||||||||||||
| E Donskoy K Majchrzak | 6 | 77 | 4 | B Bonzi A Hoang | 4 | 6 | [8] | ||||||||||||||||||||
 T Fabbiano  Y Uchiyama | 3 | 4 | 3 | M Polmans M Reid | 6 | 4 | [10] | ||||||||||||||||||||
| WC | A Fery F Gill | 6 | 6 | WC | A Fery F Gill | 3 | 4 | ||||||||||||||||||||
 T Macháč  M Vilella Martínez | 3 | M Polmans M Reid | 6 | 6 | |||||||||||||||||||||||
| 3 | M Polmans M Reid | w/o | 3 | M Polmans M Reid | 6 | 6 | |||||||||||||||||||||
| J Clarke T Kokkinakis | G Soeda  Zh Zhang | 4 | 4 | ||||||||||||||||||||||||
| G Soeda Zh Zhang | w/o | G Soeda Zh Zhang | 7 | 2 | [13] | ||||||||||||||||||||||
| WC | Tad Maclean Finn Murgett | 3 | 3 | 2 | N Lammons J Withrow | 5 | 6 | [11] | |||||||||||||||||||
| 2 | N Lammons J Withrow | 6 | 6 | ||||||||||||||||||||||||
Dayne Kelly and Marinko Matosevic were the defending champions but only Kelly defended his title, partnering Christopher O'Connell. Kelly lost in the first round to Jarmere Jenkins and Anderson Reed.
The men's doubles event was held at the 2016 Canberra Tennis International in Canberra, Australia.
Bradley Mousley and Luke Saville were the defending champions but chose to defend their title with different partners. Mousley partnered Alex Bolt and successfully defended his title. Saville partnered Matt Reid but lost in the quarterfinals to Max Purcell and Andrew Whittington.
Alex Bolt and Max Purcell were the defending champions but only Purcell chose to defend his title, partnering Lloyd Harris. Purcell lost in the semifinals to Joris De Loore and Marc Polmans.
Ken and Neal Skupski were the defending champions, but lost in the quarterfinals to Benjamin Bonzi and Antoine Hoang.
Bradley Klahn was the defending champion but chose not to defend his title.
Jeremy Beale and Marc Polmans were the defending champions but only Polmans chose to defend his title, partnering Evan King. Polmans lost in the first round to Marcelo Tomás Barrios Vera and Alejandro Tabilo.
Three-time defending champion Rafael Nadal successfully defended his title, defeating Novak Djokovic in the final, 6–0, 6–2, 7–5 to win the men's singles tennis title at the 2020 French Open. It was his record-extending 13th French Open title and 20th major title overall, equaling Roger Federer's all-time record of men's singles titles. For the fourth time in his career, Nadal won the title without dropping a set during the tournament; for the first time in French Open history, neither the men's nor women's singles champions lost a set. Nadal also became the first player, male or female, to win 100 matches at the French Open and only the second man, after Federer at the Australian Open and Wimbledon, to win 100 matches at the same major. Djokovic was attempting to become the first man in the Open Era to achieve the double career Grand Slam.
Ilya Ivashka was the defending champion but chose not to defend his title.
Daniil Medvedev defeated Pierre-Hugues Herbert in the final, 6–4, 6–7(4–7), 6–4 to capture the men's singles tennis title at the 2021 Open 13 Provence.
Quentin Halys and Tristan Lamasine were the defending champions but only Halys chose to defend his title, partnering Lucas Pouille. Halys lost in the quarterfinals to Purav Raja and Tristan-Samuel Weissborn.
Grégoire Barrère was the defending champion but lost in the final to Zizou Bergs.
Romain Arneodo and Hugo Nys were the defending champions but lost in the quarterfinals to Benjamin Bonzi and Antoine Hoang.
Aslan Karatsev was the defending champion but chose not to defend his title.
Nicolas Mahut and Pierre-Hugues Herbert defeated Alexander Bublik and Andrey Golubev in the final, 4–6, 7–6(7–1), 6–4, to win the men's doubles title at the 2021 French Open. It was their second French Open title and fifth major title together. They saved match points in their semifinal match against Juan Sebastián Cabal and Robert Farah. Bublik and Golubev became the first male Kazakhstani players to reach a major final.
The 2021 Nottingham Trophy was a professional tennis tournament played on outdoor grass courts. It was the seventh edition of the tournament which was part of the 2021 ATP Challenger Tour and the 2021 ITF Women's World Tennis Tour. It took place in Nottingham, United Kingdom between 14 and 20 June 2021.
Mats Moraing was the defending champion but lost in the second round to Botic van de Zandschulp.
Benjamin Bonzi and Antoine Hoang were the defending champions but chose not to defend their title.
Lukáš Klein and Alex Molčan were the defending champions but chose not to defend their title.
Benjamin Bonzi and Antoine Hoang were the defending champions but only Hoang chose to defend his title, partnering Romain Arneodo. Hoang lost in the quarterfinals to Jonathan Eysseric and Quentin Halys.