| 2026-05-19 | Hamburg | Clay | R32 | 34 |  Ugo Humbert | 190 |  Justin Engel | 6-3 3-6 7-6(2) | H2H | 3 | 141 | 12 | 6 | 56.0% | 84.3% | 57.5% | 3/4 |
| 2026-04-14 | Munich | Clay | R32 | 78 |  Vit Kopriva | 184 | Justin Engel | 6-3 5-7 6-2 | H2H | 3 | 130 | 2 | 2 | 64.6% | 66.1% | 44.1% | 2/6 |
| 2026-02-06 | Davis Cup QLS R1: GER vs PER | Hard | RR | 196 | Justin Engel | 217 |  Gonzalo Bueno | 6-3 6-7(4) [10-6] | H2H | 3 | 96 | 4 | 4 | 58.7% | 83.8% | 38.5% | 2/4 |
| 2025-12-22 | Next Gen ATP Finals | Hard | RR | 116 |  Alexander Blockx (2) | 187 | Justin Engel (8) | 3-4(7) 4-2 4-2 4-2 | H2H | 5 | 81 | 4 | 1 | 71.1% | 59.3% | 68.2% | 7/10 |
| 2025-12-22 | Next Gen ATP Finals | Hard | RR | 167 |  Nishesh Basavareddy (6) | 187 | Justin Engel (8) | 4-3(3) 4-2 4-3(5) | H2H | 5 | 70 | 9 | 1 | 72.1% | 72.7% | 35.3% | 6/7 |
| 2025-12-22 | Next Gen ATP Finals | Hard | RR | 128 |  Dino Prizmic (3) | 187 | Justin Engel (8) | 4-1 2-4 4-3(3) 4-1 | H2H | 5 | 88 | 6 | 0 | 71.2% | 72.3% | 31.6% | 7/9 |
| 2025-09-12 | Davis Cup QLS R2: JPN vs GER | Hard | RR | 219 | Justin Engel | 189 |  Rei Sakamoto | 3-6 7-6(2) [10-7] | H2H | 3 | 92 | 10 | 4 | 71.7% | 76.7% | 76.5% | 1/1 |
| 2025-07-21 | Kitzbuhel | Clay | R32 | 132 |  Thiago Seyboth Wild | 208 | Justin Engel (NG) | 7-5 6-3 | H2H | 3 | 96 | 1 | 0 | 70.5% | 79.1% | 61.1% | 0/1 |
| 2025-06-23 | Mallorca | Grass | R32 | 67 | Learner Tien | 219 | Justin Engel (WC) | 6-4 6-4 | H2H | 3 | 74 | 8 | 2 | 70.7% | 78.0% | 64.7% | 5/5 |
| 2025-06-09 | Stuttgart | Grass | R16 | 281 | Justin Engel (WC) | 35 | Alex Michelsen (7) | 6-4 6-4 | H2H | 3 | 77 | 5 | 1 | 66.0% | 100.0% | 56.3% | 0/0 |
