| 15‑Nov‑2021 | Pau CH | Hard | Q1 | 405 | 634 | (Alt)Arthur Reymond [FRA] d. (4)Bellucci | 6-4 6-4 | | 0.90 | 0.0% | 5.9% | 54.4% | 48.6% | 45.2% | 6/12 | 1:28 |
| 8‑Nov‑2021 | Roanne CH | Hard | Q1 | 365 | 416 | Vladyslav Orlov [UKR] d. (5)Bellucci | 6-4 6-2 | | 0.62 | 3.3% | 3.3% | 60.0% | 50.0% | 54.2% | 3/7 | 1:14 |
| 1‑Nov‑2021 | Tenerife CH | Hard | Q1 | 365 | 468 | (Alt)Yan Bondarevskiy [RUS] d. (7)Bellucci | 7-5 6-1 | | 0.70 | 5.0% | 8.8% | 51.2% | 65.9% | 38.5% | 7/11 | |
| 30‑Aug‑2021 | Manacor CH | Hard | Q1 | 335 | 1935 | (WC)Rafael Giotis [GER] d. (3)Bellucci | 7-6(4) 6-2 | | 0.94 | 3.1% | 4.7% | 56.3% | 72.2% | 46.4% | 4/7 | 1:42 |
| 2‑Aug‑2021 | Liberec CH | Clay | Q1 | 328 | 1995 | (Alt)David Vega Hernandez [ESP] d. (6)Bellucci | 6-3 3-6 6-3 | | 1.01 | 4.3% | 2.9% | 55.1% | 60.5% | 45.2% | 4/10 | 2:02 |
| 26‑Jul‑2021 | Poznan CH | Clay | Q1 | 326 | 461 | (Alt)David Poljak [CZE] d. (4)Bellucci | 4-6 6-3 6-1 | | 0.77 | 1.9% | 6.7% | 59.6% | 64.5% | 38.1% | 7/12 | 2:25 |
| 19‑Jul‑2021 | Pozoblanco CH | Hard | R32 | 322 | 262 | Matteo Viola [ITA] d. Bellucci | 6-1 6-3 | | 0.54 | 0.0% | 2.0% | 61.2% | 46.7% | 31.6% | 2/7 | 1:12 |
| 12‑Jul‑2021 | Amersfoort CH | Clay | R32 | 321 | 258 | Facundo Mena [ARG] d. (Alt)Bellucci | 6-3 6-4 | | 0.72 | 2.8% | 1.4% | 70.8% | 60.8% | 47.6% | 6/9 | 1:40 |
| 21‑Jun‑2021 | M15 Champaign IL | Hard | R16 | 318 | 966 | (Q)Kyle Seelig [USA] d. (2)Bellucci | 2-6 6-2 6-4 | | | | | | | | | |
| 21‑Jun‑2021 | M15 Champaign IL | Hard | R32 | 318 | 529 | (2)Bellucci d. Roy Smith [USA] | 7-6(4) 6-3 | | | | | | | | | |
| 14‑Jun‑2021 | M25 Tulsa OK | Hard | R32 | 321 | 456 | Genaro Alberto Olivieri [ARG] d. (4)Bellucci | 6-3 7-5 | | | | | | | | | |
| 26‑Apr‑2021 | Ostrava CH | Clay | Q1 | 325 | 162 | (1)Oscar Otte [GER] d. Bellucci | 6-4 6-3 | | 0.71 | 0.0% | 0.0% | 56.9% | 58.6% | 45.5% | 2/6 | 1:10 |
| 19‑Apr‑2021 | Tallahassee CH | Clay | R32 | 322 | 191 | Mikael Torpegaard [DEN] d. (Alt)Bellucci | 7-6(1) 7-5 | | 0.79 | 0.0% | 1.1% | 58.6% | 68.6% | 50.0% | 10/12 | 1:51 |
| 12‑Apr‑2021 | Orlando 1 CH | Hard | Q1 | 305 | 318 | Jc Aragone [USA] d. (7)Bellucci | 6-3 7-6(3) | | 0.89 | 0.0% | 5.2% | 65.5% | 63.2% | 65.0% | 2/4 | 1:46 |
| 15‑Mar‑2021 | Santiago CH | Clay | R32 | 303 | 95 | (1)Roberto Carballes Baena [ESP] d. Bellucci | 2-6 6-2 7-6(0) | | 0.96 | 1.3% | 0.0% | 66.7% | 65.4% | 53.8% | 3/7 | 2:23 |
| 8‑Mar‑2021 | Santiago | Clay | Q2 | 293 | 1171 | (WC)Nicolas Kicker [ARG] d. Bellucci | 6-0 6-4 | | 0.38 | 6.7% | 0.0% | 48.9% | 59.1% | 39.1% | 2/6 | 1:09 |
| 8‑Mar‑2021 | Santiago | Clay | Q1 | 293 | 235 | Bellucci d. Elliot Benchetrit [FRA] | 6-2 6-2 | | 1.48 | 1.8% | 3.5% | 52.6% | 66.7% | 51.9% | 6/8 | |
| 4‑Jan‑2021 | Delray Beach | Hard | R32 | 281 | 84 | Thiago Monteiro [BRA] d. Bellucci | 6-3 7-5 | | 0.74 | 4.3% | 4.3% | 60.9% | 59.5% | 44.4% | 2/6 | 1:40 |
