| 29‑Jul‑2023 | Washington Dc | Hard | Q2 | | 717 | Kiranpal Pannu [NZL] d. Kuzuhara | 3-6 6-2 7-6(6) | | 1.05 | 9.2% | 1.1% | 65.5% | 70.2% | 46.7% | 2/7 | 2:14 |
| 29‑Jul‑2023 | Washington Dc | Hard | Q1 | | 345 | Kuzuhara d. (9)Sasi Kumar Mukund [IND] | 6-4 6-2 | | 1.47 | 8.1% | 1.6% | 79.0% | 75.5% | 46.2% | 4/4 | |
| 3‑Jul‑2023 | Santa Fe CH | Clay | R16 | | 418 | (8)Pedro Boscardin Dias [BRA] d. Kuzuhara | 7-6(6) 4-6 6-3 | | 0.98 | 0.0% | 1.8% | 71.4% | 58.8% | 59.4% | 7/12 | 3:13 |
| 3‑Jul‑2023 | Santa Fe CH | Clay | R32 | | 446 | Kuzuhara d. Lucas Catarina [MON] | 6-2 6-4 | | 1.42 | 3.9% | 2.0% | 70.6% | 66.7% | 53.3% | 0/2 | 1:24 |
| 26‑Jun‑2023 | Medellin CH | Clay | Q2 | | 1061 | Juan Sebastian Gomez [COL] d. (8)Kuzuhara | 4-6 6-3 6-2 | | 0.80 | 1.0% | 5.1% | 54.1% | 60.4% | 46.7% | 8/13 | 2:00 |
| 26‑Jun‑2023 | Medellin CH | Clay | Q1 | | 1283 | (8)Kuzuhara d. (Alt)Evan King [USA] | 3-6 7-5 6-3 | | 1.02 | 0.0% | 6.7% | 63.8% | 62.7% | 50.0% | 7/12 | 2:40 |
| 5‑Jun‑2023 | Tyler CH | Hard | R32 | | 333 | (Q)Peter Gojowczyk [GER] d. Kuzuhara | 7-5 6-2 | | 0.67 | 2.9% | 4.3% | 78.3% | 59.3% | 40.0% | 3/7 | 1:23 |
| 29‑May‑2023 | Little Rock CH | Hard | R32 | | 182 | (1)Tung Lin Wu [TPE] d. Kuzuhara | 6-3 4-6 6-4 | | 1.05 | 3.5% | 7.1% | 65.9% | 66.1% | 55.2% | 5/9 | 2:19 |
| 24‑Apr‑2023 | Savannah CH | Clay | R32 | | 269 | (7)Mitchell Krueger [USA] d. (Q)Kuzuhara | 7-5 7-6(13) | | 0.88 | 1.0% | 3.0% | 57.6% | 49.1% | 52.4% | 4/10 | 2:42 |
| 24‑Apr‑2023 | Savannah CH | Clay | Q2 | | 710 | (WC)Kuzuhara d. (Alt)Blu Baker [GBR] | 6-4 4-6 6-1 | | 1.26 | 3.4% | 4.6% | 69.0% | 58.3% | 59.3% | 5/9 | 2:13 |
| 24‑Apr‑2023 | Savannah CH | Clay | Q1 | | 407 | (WC)Kuzuhara d. (5)Dmitry Popko [KAZ] | 7-6(4) 2-6 6-4 | | 0.97 | 1.1% | 4.2% | 65.3% | 69.4% | 39.4% | 3/9 | 2:36 |
| 17‑Apr‑2023 | Tallahassee CH | Clay | R32 | | 438 | (Q)Kyrian Jacquet [FRA] d. (WC)Kuzuhara | 6-2 6-1 | | 0.39 | 0.0% | 1.9% | 54.7% | 51.7% | 25.0% | 4/10 | 1:06 |
| 10‑Apr‑2023 | Sarasota CH | Clay | Q2 | | 386 | (7)Alex Rybakov [USA] d. (WC)Kuzuhara | 5-7 6-3 6-4 | | 0.90 | 1.9% | 3.7% | 66.4% | 71.8% | 36.1% | 12/16 | 2:29 |
| 10‑Apr‑2023 | Sarasota CH | Clay | Q1 | | 327 | (WC)Kuzuhara d. (5)Moez Echargui [TUN] | 7-6(4) 7-6(3) | | 1.10 | 2.5% | 2.5% | 71.3% | 68.4% | 52.2% | 6/9 | 1:58 |
| 12‑Mar‑2023 | Vina Del Mar CH | Clay | Q1 | | 470 | (9)Jose Pereira [BRA] d. Kuzuhara | 6-2 7-5 | | 0.82 | 1.7% | 6.7% | 68.3% | 48.8% | 36.8% | 6/13 | 1:49 |
| 6‑Mar‑2023 | Santiago CH | Clay | R32 | | 96 | (3)Facundo Bagnis [ARG] d. Kuzuhara | 6-0 6-1 | | 0.40 | 4.5% | 6.8% | 61.4% | 44.4% | 29.4% | 6/11 | 1:06 |