| Singles | |
|---|---|
| 2021 Sánchez-Casal Cup | |
| Champion |  Dimitar Kuzmanov |
| Runner-up |  Hugo Gaston |
| Score | 6–3, 6–0 |
Carlos Alcaraz was the defending champion [1] but chose not to defend his title.
Dimitar Kuzmanov won the title after defeating Hugo Gaston 6–3, 6–0 in the final.
Hugo Gaston (final)
Alex Molčan (semifinals)
Bernabé Zapata Miralles (first round, retired)
Damir Džumhur (second round)
Nikola Milojević (second round)
Marc Polmans (first round)
Cedrik-Marcel Stebe (withdrew)
Jiří Lehečka (first round)| Semifinals | Final | ||||||||||||
| 1 | Hugo Gaston | 6 | 0 | 6 | |||||||||
| Alexandre Müller | 2 | 6 | 0 | ||||||||||
| 1 | Hugo Gaston | 3 | 0 | ||||||||||
| Dimitar Kuzmanov | 6 | 6 | |||||||||||
| Dimitar Kuzmanov | 7 | 77 | |||||||||||
| 2 | Alex Molčan | 5 | 65 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | H Gaston | 7 | 6 | ||||||||||||||||||||||||
 A Collarini | 5 | 2 | 1 | H Gaston | 6 | 6 | |||||||||||||||||||||
| LL |  O Krutykh | 6 | 6 | LL | O Krutykh | 0 | 2 | ||||||||||||||||||||
| WC | P Llamas Ruiz | 2 | 2 | 1 | H Gaston | 6 | 6 | ||||||||||||||||||||
| F Horanský | 6 | 2 | 7 | Q | N Álvarez Varona | 2 | 1 | ||||||||||||||||||||
| M Marterer | 4 | 6 | 5 | F Horanský | 4 | 3 | |||||||||||||||||||||
| Q | N Álvarez Varona | 6 | 77 | Q | N Álvarez Varona | 6 | 6 | ||||||||||||||||||||
| 8 | J Lehečka | 2 | 61 | 1 | H Gaston | 6 | 0 | 6 | |||||||||||||||||||
| 3 | B Zapata Miralles | 2 | 0r | A Müller | 2 | 6 | 0 | ||||||||||||||||||||
| J Barranco Cosano | 6 | 1 | J Barranco Cosano | 3 | 2 | ||||||||||||||||||||||
| Alt | A Andreev | 4 | 1r | A Müller | 6 | 6 | |||||||||||||||||||||
| A Müller | 6 | 4 | A Müller | 6 | 6 | ||||||||||||||||||||||
 D Popko | 6 | 6 | Q | M Martineau | 3 | 2 | |||||||||||||||||||||
| T Lamasine | 3 | 2 | D Popko | 62 | 2 | ||||||||||||||||||||||
| Q | M Martineau | 6 | 6 | Q | M Martineau | 77 | 6 | ||||||||||||||||||||
| 6 | M Polmans | 4 | 3 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| LL | A López San Martín | 1 | 0 | ||||||||||||||||||||||||
 N Borges | 6 | 6 | N Borges | 66 | 5 | ||||||||||||||||||||||
| WC | N Sánchez Izquierdo | 5 | 2 |  T Gabashvili | 78 | 7 | |||||||||||||||||||||
| T Gabashvili | 7 | 6 | T Gabashvili | 2 | 0 | ||||||||||||||||||||||
| D Kuzmanov | 6 | 6 | D Kuzmanov | 6 | 6 | ||||||||||||||||||||||
| T Robredo | 0 | 1 | D Kuzmanov | 6 | 6 | ||||||||||||||||||||||
| Q | Georgii Kravchenko | 6 | 3 | 1 | 4 | D Džumhur | 4 | 4 | |||||||||||||||||||
| 4 | D Džumhur | 3 | 6 | 6 | D Kuzmanov | 7 | 77 | ||||||||||||||||||||
| 5 | N Milojević | 7 | 0 | 6 | 2 | A Molčan | 5 | 65 | |||||||||||||||||||
| Q |  Y Oliel | 5 | 6 | 4 | 5 | N Milojević | 5 | 2 | |||||||||||||||||||
| P Krstin | 4 | 4 | N Kuhn | 7 | 6 | ||||||||||||||||||||||
| N Kuhn | 6 | 6 | N Kuhn | 3 | 2 | ||||||||||||||||||||||
| M Guinard | 6 | 64 | 1 | 2 | A Molčan | 6 | 6 | ||||||||||||||||||||
| T Skatov | 3 | 77 | 6 | T Skatov | 1 | 66 | |||||||||||||||||||||
| WC | A Moro Cañas | 1 | 3 | 2 | A Molčan | 6 | 78 | ||||||||||||||||||||
| 2 | A Molčan | 6 | 6 | ||||||||||||||||||||||||
Hugo Gaston and Clément Tabur won the boys' doubles tennis title at the 2018 Australian Open, defeating Rudolf Molleker and Henri Squire in the final, 6–2, 6–2.
Axel Geller and Hsu Yu-hsiou were the defending champions, but both players were ineligible to participate in junior events.
Henri Laaksonen was the defending champion but chose not to defend his title.
Daniel Masur was the defending champion but chose not to defend his title.
Carlos Taberner was the defending champion but chose not to defend his title.
The 2021 Next Generation ATP Finals was a men's exhibition tennis tournament for the best singles players on the 2021 ATP Tour who were age 21 and under. It ran from 9 to 13 November 2021 in Milan, Italy at the PalaLido and was the fourth edition of the event.
Carlos Alcaraz was the defending champion but chose not to defend his title.
Félix Auger-Aliassime defeated Stefanos Tsitsipas in the final, 6–4, 6–2. It was his maiden ATP Tour singles title, following eight runner-up finishes in prior finals.
Carlos Alcaraz defeated Diego Schwartzman in the final, 6–4, 6–2 to win the singles title at the 2022 Rio Open. Alcaraz became the youngest winner of an ATP Tour 500 event since the category was created in 2009.
Defending champion Stefanos Tsitsipas defeated Alejandro Davidovich Fokina in the final, 6–3, 7–6(7–3) to win the singles tennis title at the 2022 Monte-Carlo Masters. He became the sixth player to win consecutive titles at the Monte-Carlo Masters in the Open Era. The win also earned him his second Masters 1000 title and his eighth career singles title overall.
Carlos Alcaraz defeated Pablo Carreño Busta in the final, 6–3, 6–2 to win the singles tennis title at the 2022 Barcelona Open. Alcaraz saved two match points en route to the title, in the semifinals against Alex de Minaur. With the win, Alcaraz entered the top 10 in rankings for the first time in his career, becoming the youngest man to do so since Rafael Nadal in 2005.
Carlos Alcaraz defeated the defending champion Alexander Zverev in the final, 6–3, 6–1 to win the men's singles tennis title at the 2022 Madrid Open. Alcaraz also became the first man to defeat Rafael Nadal and Novak Djokovic in the same clay court tournament, which he did in the quarterfinals and semifinals, respectively.
Jannik Sinner defeated the defending champion Carlos Alcaraz in the final, 6–7(5–7), 6–1, 6–1 to win the singles tennis title at the 2022 Croatia Open Umag.
Pablo Carreño Busta defeated Hubert Hurkacz in the final, 3–6, 6–3, 6–3 to win the men's singles tennis title at the 2022 Canadian Open. Carreño Busta's first title of the season was also his maiden ATP Masters 1000 title. Hurkacz's defeat in the contest for his second Masters 1000 title was also a career-first loss in a tour-level final after he was bidding to win a sixth title in six finals.
Jiří Veselý was the defending champion but chose not to defend his title.
Benjamin Bonzi was the defending champion but chose not to defend his title.
Hugo Grenier was the defending champion but lost in the first round to Otto Virtanen.
Jordan Thompson was the defending champion but chose not to defend his title.
Carlos Alcaraz defeated Cameron Norrie in the final, 6–3, 7–5 to win the singles tennis title at the 2023 Argentina Open.
Cameron Norrie defeated the defending champion Carlos Alcaraz in the final, 5–7, 6–4, 7–5 to win the singles tennis title at the 2023 Rio Open. It was their second final meeting in as many weeks, with Alcaraz winning the title in Buenos Aires the week prior.