| 22‑Apr‑2024 | Madrid Masters | Clay | R128 | 89 | 86 | (LL)Roberto Bautista Agut [ESP] d. Galan | 7-6(4) 4-6 6-1 | | 0.86 | 11.8% | 0.9% | 61.8% | 66.2% | 45.2% | 4/8 | 2:42 |
| 4‑Mar‑2024 | Indian Wells Masters | Hard | R128 | 84 | 76 | Taro Daniel [JPN] d. Galan | 6-4 6-1 | | 0.77 | 1.4% | 7.2% | 50.7% | 62.9% | 32.4% | 5/10 | 1:46 |
| 19‑Feb‑2024 | Rio De Janeiro | Clay | R32 | 78 | 58 | Dusan Lajovic [SRB] d. Galan | 4-6 7-6(8) 6-1 | | 0.92 | 3.9% | 3.9% | 50.5% | 73.1% | 47.1% | 7/11 | 2:43 |
| 16‑Oct‑2023 | Antwerp | Hard | R32 | 92 | 72 | Gregoire Barrere [FRA] d. Galan | 6-1 7-6(5) | | 0.64 | 11.9% | 3.4% | 64.4% | 73.7% | 47.6% | 2/5 | 1:11 |
| 16‑Jan‑2023 | Australian Open | Hard | R128 | 70 | | Jeremy Chardy [FRA] d. Galan | 1-6 7-5 6-1 6-4 | | 0.93 | 1.6% | 3.3% | 59.8% | 61.6% | 44.9% | 10/17 | 3:19 |
| 10‑Oct‑2022 | Florence | Hard | R32 | 71 | 80 | Roberto Carballes Baena [ESP] d. Galan | 6-2 6-1 | | 0.34 | 3.0% | 1.5% | 80.6% | 55.6% | 23.1% | 8/13 | 1:14 |
| 25‑Jul‑2022 | Umag | Clay | R16 | 99 | 168 | (Q)Giulio Zeppieri [ITA] d. Galan | 6-4 3-6 6-1 | | 0.72 | 3.9% | 2.9% | 65.7% | 68.7% | 40.0% | 8/11 | 2:09 |
| 27‑Jun‑2022 | Wimbledon | Grass | R32 | 109 | 56 | Brandon Nakashima [USA] d. Galan | 6-4 6-4 6-1 | | 0.43 | 8.2% | 5.2% | 53.6% | 67.3% | 46.7% | 12/16 | 1:51 |
| 21‑Feb‑2022 | Santiago | Clay | R32 | 104 | 93 | Jaume Munar [ESP] d. Galan | 6-1 6-3 | | 0.72 | 1.8% | 3.5% | 70.2% | 55.0% | 35.3% | 9/14 | 1:34 |
| 28‑Jun‑2021 | Wimbledon | Grass | R64 | 112 | 27 | (23)Lorenzo Sonego [ITA] d. Galan | 4-6 6-3 7-6(3) 6-1 | | 0.83 | 2.8% | 1.9% | 68.5% | 67.6% | 41.2% | 2/8 | 2:44 |
| 15‑Mar‑2021 | Acapulco | Hard | R32 | 112 | 25 | (8)Casper Ruud [NOR] d. (SE)Galan | 6-4 6-1 | (ch) | 0.47 | 6.4% | 0.0% | 57.4% | 66.7% | 40.0% | 1/4 | 1:08 |
| 20‑Jul‑2015 | Bogota | Hard | R16 | 607 | 23 | (1)Ivo Karlovic [CRO] d. (WC)Galan | 6-7(12) 6-1 6-3 | | 0.40 | 3.7% | 3.7% | 59.8% | 71.9% | 46.5% | 4/8 | |