| 14‑Jun‑2021 | Halle | Grass | R16 | 214 | 51 | Lloyd Harris [RSA] d. (Q)Lacko | 6-3 7-6(8) | | 0.75 | 5.6% | 0.0% | 65.3% | 72.3% | 56.0% | 2/4 | 1:26 |
| 14‑Jun‑2021 | Halle | Grass | R32 | 214 | 62 | (Q)Lacko d. Guido Pella [ARG] | 6-7(5) 7-5 6-1 | | 1.35 | 4.0% | 3.0% | 59.6% | 71.2% | 70.0% | 3/4 | 2:20 |
| 14‑Jun‑2021 | Halle | Grass | Q2 | 214 | 109 | (PR)Lacko d. (11)Joao Sousa [POR] | 4-6 6-4 6-3 | | 0.99 | 9.6% | 0.0% | 63.8% | 68.3% | 55.9% | 3/5 | 1:51 |
| 14‑Jun‑2021 | Halle | Grass | Q1 | 214 | 76 | (PR)Lacko d. (2)Egor Gerasimov [BLR] | 6-4 7-5 | | 1.39 | 6.8% | 1.7% | 71.2% | 81.0% | 58.8% | 1/2 | 1:17 |
| 18‑Jun‑2018 | Halle | Grass | R32 | 96 | 109 | (Q)Denis Kudla [USA] d. (Q)Lacko | 6-4 6-4 | | 0.82 | 14.3% | 0.0% | 57.1% | 75.0% | 71.4% | 0/2 | 1:07 |
| 18‑Jun‑2018 | Halle | Grass | Q2 | 96 | 134 | Lacko d. (WC)Yannick Maden [GER] | 6-2 6-3 | | 1.38 | 12.7% | 0.0% | 50.9% | 78.6% | 44.4% | 3/5 | 1:25 |
| 18‑Jun‑2018 | Halle | Grass | Q1 | 96 | 114 | Lacko d. (7)Ivo Karlovic [CRO] | 7-6(5) 7-6(2) | | 0.91 | 11.0% | 4.9% | 67.1% | 87.3% | 51.9% | 4/4 | 1:29 |
| 19‑Jun‑2017 | Halle | Grass | R32 | 103 | 29 | Mischa Zverev [GER] d. (Q)Lacko | 6-4 6-4 | | 0.72 | 3.1% | 3.1% | 71.9% | 63.0% | 61.1% | 4/6 | 1:15 |
| 19‑Jun‑2017 | Halle | Grass | Q2 | 103 | 85 | (8)Lacko d. (3)Andreas Seppi [ITA] | 6-4 7-5 | | 1.13 | 9.3% | 1.3% | 72.0% | 75.9% | 38.1% | 6/7 | 1:20 |
| 19‑Jun‑2017 | Halle | Grass | Q1 | 103 | 120 | (8)Lacko d. Ruben Bemelmans [BEL] | 6-4 6-3 | | 1.32 | 9.4% | 4.7% | 64.1% | 82.9% | 47.8% | 5/6 | 1:03 |
| 15‑Jun‑2015 | Halle | Grass | R32 | 94 | 147 | (Q)Alejandro Falla [COL] d. (Q)Lacko | 6-4 3-6 6-1 | | 0.83 | 5.3% | 2.6% | 57.9% | 56.8% | 68.8% | 3/7 | |
| 15‑Jun‑2015 | Halle | Grass | Q2 | 94 | 105 | (4)Lacko d. Jurgen Melzer [AUT] | 4-6 6-3 7-5 | | | | | | | | | |
| 15‑Jun‑2015 | Halle | Grass | Q1 | 94 | 159 | (4)Lacko d. (WC)Peter Gojowczyk [GER] | 7-6(5) 3-6 6-4 | | | | | | | | | |
| 11‑Jun‑2012 | Halle | Grass | R16 | 58 | 2 | (1)Rafael Nadal [ESP] d. Lacko | 7-5 6-1 | | 0.56 | 6.3% | 4.7% | 65.6% | 61.9% | 31.8% | 4/8 | 1:16 |
| 11‑Jun‑2012 | Halle | Grass | R32 | 58 | 179 | Lacko d. (Q)Konstantin Kravchuk [RUS] | 2-6 6-2 6-3 | | 1.04 | 6.7% | 0.0% | 70.7% | 69.8% | 40.9% | 1/4 | 2:29 |
| 7‑Jun‑2010 | Halle | Grass | QF | 75 | 41 | Philipp Petzschner [GER] d. Lacko | 6-4 6-3 | | 0.95 | 5.0% | 1.7% | 63.3% | 68.4% | 45.5% | 3/7 | 1:15 |
| 7‑Jun‑2010 | Halle | Grass | R16 | 75 | 203 | Lacko d. (LL)Dominik Meffert [GER] | 2-6 6-4 6-3 | | 1.19 | 13.9% | 1.3% | 63.3% | 72.0% | 58.6% | 6/9 | 1:50 |
| 7‑Jun‑2010 | Halle | Grass | R32 | 75 | 55 | Lacko d. Jeremy Chardy [FRA] | 7-5 7-6(0) | | 1.18 | 5.5% | 1.4% | 71.2% | 75.0% | 57.1% | 1/2 | 1:23 |
| 8‑Jun‑2009 | Halle | Grass | R16 | 217 | 53 | Andreas Beck [GER] d. (LL)Lacko | 7-5 7-6(5) | | 0.42 | 5.7% | 2.3% | 56.8% | 76.0% | 50.0% | 5/6 | 1:30 |
| 8‑Jun‑2009 | Halle | Grass | R32 | 217 | 231 | (LL)Lacko d. (Q)Harel Levy [ISR] | 7-6(6) 6-2 | | 1.20 | 2.9% | 4.4% | 64.7% | 72.7% | 41.7% | 3/5 | 1:14 |
| 8‑Jun‑2009 | Halle | Grass | Q3 | 217 | 231 | Harel Levy [ISR] d. Lacko | 6-7(4) 6-4 6-2 | | | | | | | | | |
| 8‑Jun‑2009 | Halle | Grass | Q2 | 217 | 196 | Lacko d. Ivan Dodig [CRO] | 6-1 3-6 7-6(4) | | | | | | | | | |
| 8‑Jun‑2009 | Halle | Grass | Q1 | 217 | 211 | Lacko d. Marco Chiudinelli [SUI] | 6-2 6-7(2) 6-2 | | | | | | | | | |
