| Singles | |
|---|---|
| 2021 Brest Challenger | |
| Champion |  Brandon Nakashima |
| Runner-up |  João Sousa |
| Score | 6–3, 6–3 |
Ugo Humbert was the defending champion [1] but chose not to defend his title.
Brandon Nakashima won the title after defeating João Sousa 6–3, 6–3 in the final.
Arthur Rinderknech (first round) Jenson Brooksby (withdrew) Richard Gasquet (quarterfinals, withdrew) Brandon Nakashima (champion)
Stefano Travaglia (second round) Pierre-Hugues Herbert (first round)
Henri Laaksonen (quarterfinals) Hugo Gaston (second round)| Semifinals | Final | ||||||||||||
| Alexandre Müller | 2 | 5 | |||||||||||
| 4 | Brandon Nakashima | 6 | 7 | ||||||||||
| 4 | Brandon Nakashima | 6 | 6 | ||||||||||
| João Sousa | 3 | 3 | |||||||||||
| Alt | Maxime Janvier | 5 | 1 | ||||||||||
| João Sousa | 7 | 6 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/WC | A Rinderknech | 4 | 2 | ||||||||||||||||||||||||
| WC | M Guinard | 6 | 6 | WC | M Guinard | 64 | 3 | ||||||||||||||||||||
 F Horanský | 3 | 3 | WC | L Van Assche | 77 | 6 | |||||||||||||||||||||
| WC | L Van Assche | 6 | 6 | WC | L Van Assche | 3 | 4 | ||||||||||||||||||||
| Q |  A Nedovyesov | 3 | 6 | 62 | A Müller | 6 | 6 | ||||||||||||||||||||
| A Müller | 6 | 3 | 77 | A Müller | 77 | 1 | 6 | ||||||||||||||||||||
 M Safwat | 4 | 4 | 5 | S Travaglia | 64 | 6 | 1 | ||||||||||||||||||||
| 5 | S Travaglia | 6 | 6 | A Müller | 2 | 5 | |||||||||||||||||||||
| 4 | B Nakashima | 6 | 77 | 4 | B Nakashima | 6 | 7 | ||||||||||||||||||||
| Q |  Z Piros | 3 | 64 | 4 | B Nakashima | 6 | 6 | ||||||||||||||||||||
 F Verdasco | 6 | 4 | 1 | B Zapata Miralles | 4 | 1 | |||||||||||||||||||||
| B Zapata Miralles | 3 | 6 | 6 | 4 | B Nakashima | 6 | 7 | ||||||||||||||||||||
 H Rune | 6 | 6 | 7 | H Laaksonen | 1 | 5 | |||||||||||||||||||||
 Z Kolář | 3 | 3 | H Rune | 4 | 4 | ||||||||||||||||||||||
 L Broady | 1 | 5 | 7 | H Laaksonen | 6 | 6 | |||||||||||||||||||||
| 7 | H Laaksonen | 6 | 7 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | H Gaston | 6 | 6 | ||||||||||||||||||||||||
| S Caruso | 3 | 4 | 8 | H Gaston | 65 | 6 | 4 | ||||||||||||||||||||
| LL | V Royer | 6 | 5 | 0 | Alt | M Janvier | 77 | 2 | 6 | ||||||||||||||||||
| Alt | M Janvier | 3 | 7 | 6 | Alt | M Janvier | w/o | ||||||||||||||||||||
| T Fabbiano | 77 | 7 | 3 | R Gasquet | |||||||||||||||||||||||
| Q |  A Vatutin | 64 | 5 | T Fabbiano | 2 | 6 | 2 | ||||||||||||||||||||
| J Lehečka | 2 | 4 | 3 | R Gasquet | 6 | 4 | 6 | ||||||||||||||||||||
| 3 | R Gasquet | 6 | 6 | Alt | M Janvier | 5 | 1 | ||||||||||||||||||||
| 6 | P-H Herbert | 4 | 6 | 3 | J Sousa | 7 | 6 | ||||||||||||||||||||
| F Gaio | 6 | 3 | 6 | F Gaio | 4 | 77 | 6 | ||||||||||||||||||||
| F Ferreira Silva | 4 | 6 | 6 | F Ferreira Silva | 6 | 63 | 2 | ||||||||||||||||||||
| A Hoang | 6 | 4 | 4 | F Gaio | 3 | 77 | 65 | ||||||||||||||||||||
| J Sousa | 6 | 6 | J Sousa | 6 | 65 | 77 | |||||||||||||||||||||
| H Grenier | 4 | 1 | J Sousa | 6 | 78 | ||||||||||||||||||||||
| SE | C Taberner | 65 | 65 | Q | K de Schepper | 4 | 66 | ||||||||||||||||||||
| Q | K de Schepper | 77 | 77 | ||||||||||||||||||||||||
Maximilian Marterer was the defending champion but chose not to defend his title.
Shintaro Mochizuki won the title, defeating Carlos Gimeno Valero in the final, 6–3, 6–2. He saved a match point in the semifinals against Martin Damm.
Eliot Spizzirri and Tyler Zink won the boys' doubles tennis title at the 2019 US Open, defeating Andrew Paulson and Alexander Zgirovsky in the final, 7–6(7–4), 6–4.
Marcos Giron was the defending champion but chose not to defend his title.
This event was the second edition of the Open Quimper Bretagne in 2021 after the Open d'Orléans was delayed due to the COVID-19 pandemic in France.
Alexander Zverev defeated top seed Stefanos Tsitsipas in the final, 6–4, 7–6(7–3) to win the men's singles tennis title at the 2021 Mexican Open.
Albert Ramos Viñolas defeated Cameron Norrie in the final, 4–6, 6–3, 7–6(7–3) to win the singles tennis title at the 2021 Estoril Open. It marked his third career ATP Tour singles title, all of which have been on clay. Norrie was aiming to win his first ATP Tour title in his second final.
Ugo Humbert was the defending champion, but chose not to participate this year.
Novak Djokovic defeated Stefanos Tsitsipas in the final, 6–0, 7–6(7–5) to win the men's singles tennis title at the 2022 Italian Open. It was his sixth Italian Open title and record-extending 38th Masters 1000 title overall. Djokovic did not lose a set during the tournament, and won his 1000th ATP Tour-level career match against Casper Ruud in the semifinals.
Dan Evans was the defending champion but chose not to defend his title.
Taylor Fritz defeated Maxime Cressy in the final, 6–2, 6–7(4–7), 7–6(7–4) to win the men's singles tennis title at the 2022 Eastbourne International.
Alex de Minaur defeated Jenson Brooksby in the final, 6–3, 6–3 to win the singles title at the 2022 Atlanta Open. It was de Minaur's second Atlanta title, the first being in 2019.
Daniil Medvedev defeated the defending champion Cameron Norrie in the final, 7–5, 6–0 to win the singles tennis title. It was his 14th career ATP Tour title, his first of the season, and his first since the 2021 US Open eleven months earlier.
Brandon Nakashima was the defending champion but chose not to defend his title.
Ugo Humbert was the defending champion but chose not to defend his title.
Matteo Gigante was the defending champion but chose not to defend his title.
Roman Safiullin was the defending champion but chose not to defend his title.
Giulio Zeppieri was the defending champion but chose not to defend his title.
Otto Virtanen was the defending champion but lost in the semifinals to Arthur Rinderknech.
Jannik Sinner defeated Frances Tiafoe in the final, 7–6(7–4), 6–2 to win the men's singles tennis title at the 2024 Cincinnati Open. It was his third Masters 1000 and 15th career ATP Tour title.