| Details | |
|---|---|
| Duration | 18 January 2021 – 19 December 2021 |
| Edition | 44th (13th under this name) |
| Tournaments | 147 |
| Categories | Challenger 125 (11) Challenger 110 (0) Challenger 100 (10) Challenger 90 (11) Challenger 80 (105) Challenger 50 (10) |
| Achievements (singles) | |
| Most tournament titles |  Tallon Griekspoor (8) |
| Most tournament finals |  Sebastián Báez (9) |
← 2020 2022 → | |
The ATP Challenger Tour in 2021 was the secondary professional tennis circuit organized by the ATP. The 2021 ATP Challenger Tour calendar comprised 147 tournaments with prize money ranging from $36,680 up to $156,240. It was the 44th edition of challenger tournaments cycle, and 13th under the name of Challenger Tour.
Tallon Griekspoor set a new record for winning the most Challenger titles in a season when he won his seventh title of the season at the Tenerife Challenger and immediately improved upon the record by winning the Slovak Open II the week after.[1]
- ^ "Challenger Tenerife: Tallon Griekspoor sets a new record". tennisnet.com. November 7, 2021. Retrieved November 15, 2021.