| 27‑May‑2024 | Roland Garros | Clay | R32 | 145 | 13 | (13)Holger Rune [DEN] d. (LL)Kovalik | 7-5 6-1 7-6(2) | | 0.72 | 1.0% | 5.8% | 62.1% | 54.7% | 53.8% | 6/11 | |
| 8‑Nov‑2021 | Stockholm | Hard | R16 | 135 | 60 | Arthur Rinderknech [FRA] d. (LL)Kovalik | 6-4 6-1 | | 0.59 | 3.2% | 4.8% | 57.1% | 63.9% | 37.0% | 6/10 | 1:19 |
| 8‑Mar‑2021 | Santiago | Clay | R32 | 129 | 168 | (Q)Alejandro Tabilo [CHI] d. Kovalik | 6-1 0-6 6-4 | | 1.03 | 10.9% | 4.7% | 64.1% | 68.3% | 34.8% | 1/5 | 1:44 |
| 22‑Feb‑2021 | Cordoba | Clay | QF | 128 | 130 | (Q)Facundo Bagnis [ARG] d. Kovalik | 6-1 6-2 | | 0.52 | 0.0% | 6.3% | 56.3% | 63.0% | 33.3% | 7/11 | 1:10 |
| 22‑Feb‑2021 | Cordoba | Clay | R32 | 128 | 116 | Kovalik d. Daniel Elahi Galan [COL] | 6-2 1-6 6-3 | | 1.08 | 1.4% | 2.9% | 70.0% | 67.3% | 42.9% | 4/7 | 1:43 |
| 31‑Aug‑2020 | US Open | Hard | R128 | 123 | 168 | Maxime Cressy [USA] d. Kovalik | 6-1 2-6 6-4 6-4 | | 0.85 | 4.3% | 3.3% | 70.7% | 70.8% | 48.1% | 1/6 | 2:18 |
| 20‑Jan‑2020 | Australian Open | Hard | R128 | 139 | 30 | (27)Pablo Carreno Busta [ESP] d. (LL)Kovalik | 6-4 3-6 6-1 7-6(2) | | 0.67 | 7.3% | 1.8% | 60.0% | 65.2% | 59.1% | 4/8 | 2:37 |
| 1‑Jul‑2019 | Wimbledon | Grass | R128 | 165 | 76 | Robin Haase [NED] d. Kovalik | 6-1 6-3 6-1 | (ch) | 0.47 | 2.7% | 12.2% | 64.9% | 58.3% | 26.9% | 3/10 | 1:21 |
| 27‑May‑2019 | Roland Garros | Clay | R128 | 132 | 28 | (24)Stan Wawrinka [SUI] d. Kovalik | 6-1 6-7(3) 6-2 6-3 | | 0.77 | 2.9% | 1.9% | 59.6% | 69.4% | 61.9% | 3/8 | 2:22 |
| 8‑Apr‑2019 | Marrakech | Clay | R32 | 120 | 27 | (4)Gilles Simon [FRA] d. Kovalik | 6-4 6-1 | | 0.74 | 0.0% | 2.0% | 54.0% | 66.7% | 47.8% | 2/5 | 1:30 |
| 30‑Jul‑2018 | Kitzbuhel | Clay | R32 | 82 | 98 | Radu Albot [MDA] d. (SE)Kovalik | 6-1 6-3 | | 0.52 | 4.1% | 1.4% | 63.0% | 63.0% | 29.6% | 6/10 | 1:16 |
| 28‑May‑2018 | Roland Garros | Clay | R128 | 146 | 11 | (10)Pablo Carreno Busta [ESP] d. (Q)Kovalik | 4-6 6-1 7-5 7-6(5) | | 0.96 | 5.8% | 0.8% | 55.8% | 76.1% | 39.6% | 8/14 | 3:01 |
| 2‑Jan‑2017 | Chennai | Hard | QF | 117 | 99 | Daniil Medvedev [RUS] d. (Q)Kovalik | 6-1 6-4 | | 0.74 | 4.3% | 7.2% | 65.2% | 57.8% | 37.5% | 6/11 | 1:24 |
| 29‑Aug‑2016 | US Open | Hard | R128 | 126 | 123 | Vasek Pospisil [CAN] d. (LL)Kovalik | 6-1 6-3 6-3 | | 0.67 | 4.8% | 8.1% | 46.8% | 69.0% | 48.5% | 3/8 | 1:36 |
| 18‑Jul‑2016 | Gstaad | Clay | R32 | 126 | 165 | (WC)Henri Laaksonen [SUI] d. Kovalik | 3-6 6-1 7-6(5) | | 0.93 | 4.2% | 4.2% | 65.6% | 66.7% | 48.5% | 2/5 | 2:08 |
