Includes finals, playoffs and exhibition games, so totals run higher than regular-season figures.
| Season | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 Atp tourSlovakia | 2 | 0 | 2 | 5 | 36 | 36 | 3 | 15 | 7 | 217 | 140 | 107 | 42 | 35 | 7 | 11 | 219 | 75 | 5 | 12 | 1 | – | – | 1 | – | 293 |
| 2024 Atp tourSlovakia | 20 | 9 | 27 | 27 | 288 | 285 | 17 | 157 | 60 | 1,728 | 1,131 | 842 | 311 | 278 | 72 | 118 | 1,839 | 641 | 44 | 141 | 2 | 5 | – | 3 | – | 2,477 |
| 2023 Atp tourSlovakia | 3 | 0 | 2 | 5 | 35 | 44 | 3 | 9 | 8 | 171 | 105 | 68 | 39 | 23 | 15 | 20 | 151 | 43 | 0 | 8 | – | – | – | 2 | 1 | 87 |
| 2022 Atp tour | 1 | 0 | 2 | 3 | 24 | 29 | 1 | 12 | 6 | 144 | 98 | 67 | 29 | 25 | 5 | 11 | 178 | 64 | 4 | 14 | 1 | – | – | – | – | 211 |
| 2021 Atp tour | 6 | 2 | 6 | 8 | 68 | 74 | 2 | 14 | 18 | 350 | 223 | 154 | 62 | 54 | 15 | 26 | 360 | 132 | 8 | 38 | – | – | 1 | – | – | 476 |
| Career5 seasons | 32 | 11 | 39 | 48 | 451 | 468 | 26 | 207 | 99 | 2,610 | 1,697 | 1,238 | 483 | 415 | 114 | 186 | 2,747 | 955 | 61 | 213 | 4 | 5 | 1 | 6 | 1 | 3,544 |
| Game | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Davis Cup - World Group I v Adria Soriano BarreraL 1-2 31 Jan | 0 | 1 | 2 | 18 | 17 | 2 | 4 | 3 | 109 | 76 | 62 | 18 | 17 | 3 | 3 | 106 | 31 | 1 | 2 | – | – | – | 1 | – | 143 |
| Australian Open: Round of 128 v Sebastian KordaL 1-3 12 Jan | 0 | 1 | 3 | 18 | 19 | 1 | 11 | 4 | 108 | 64 | 45 | 24 | 18 | 4 | 8 | 113 | 44 | 4 | 10 | 1 | – | – | – | – | 150 |
| Split | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LossesResult | 21 | 0.0 | 0.8 | 2.1 | 13.8 | 16.3 | 0.8 | 5.7 | 3.2 | 83.7 | 54.3 | 38.8 | 15.0 | 13.0 | 4.1 | 6.7 | 85.0 | 27.6 | 1.5 | 5.9 | 0.1 | 0.1 | 0.0 | 0.2 | 0.0 | 110 |
| WinsResult | 11 | 1.0 | 2.1 | 0.4 | 14.7 | 11.4 | 0.8 | 7.9 | 2.9 | 77.5 | 50.6 | 38.5 | 15.4 | 12.8 | 2.5 | 4.1 | 87.4 | 34.2 | 2.7 | 8.1 | 0.1 | 0.2 | – | 0.1 | – | 112 |
| Regular seasonStage · won 11 of 29 | 29 | 0.4 | 1.3 | 1.4 | 14.5 | 14.7 | 0.9 | 6.3 | 3.2 | 82.7 | 53.6 | 39.0 | 15.8 | 13.1 | 3.6 | 5.8 | 87.2 | 30.6 | 2.0 | 7.0 | 0.1 | 0.2 | 0.0 | 0.1 | 0.0 | 112 |
| FinalsStage · won 0 of 3 | 3 | 0.0 | 0.3 | 2.0 | 10.3 | 13.7 | 0.3 | 8.0 | 1.7 | 70.3 | 47.7 | 35.3 | 8.7 | 11.3 | 3.3 | 6.0 | 72.3 | 22.3 | 1.3 | 3.3 | – | – | – | 0.7 | – | 95.7 |
| James DuckworthOpponent · won 1 of 2 | 2 | 0.5 | 1.5 | 1.0 | 14.0 | 12.0 | 0.5 | 2.5 | 1.0 | 22.5 | 13.5 | 9.5 | 5.5 | 4.5 | 1.0 | 2.0 | 36.5 | 19.5 | 2.5 | 10.5 | – | – | 0.5 | – | – | 38.5 |
| Adam WaltonOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 13.0 | 10.0 | 1.0 | 12.0 | 2.0 | 63.0 | 40.0 | 31.0 | 18.0 | 11.0 | 1.0 | 1.0 | 72.0 | 24.0 | 1.0 | 5.0 | – | – | – | – | – | 100 |
| Adria Soriano BarreraOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 18.0 | 17.0 | 2.0 | 4.0 | 3.0 | 109 | 76.0 | 62.0 | 18.0 | 17.0 | 3.0 | 3.0 | 106 | 31.0 | 1.0 | 2.0 | – | – | – | 1.0 | – | 143 |
| Alex MichelsenOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 8.0 | 13.0 | 1.0 | 5.0 | 3.0 | 62.0 | 39.0 | 24.0 | 12.0 | 10.0 | 5.0 | 10.0 | 67.0 | 23.0 | 3.0 | 7.0 | – | 1.0 | – | – | – | 92.0 |
| Alexander ZverevOpponent · won 0 of 1 | 1 | 0.0 | 2.0 | 3.0 | 29.0 | 28.0 | 2.0 | 13.0 | 5.0 | 201 | 133 | 99.0 | 35.0 | 27.0 | 8.0 | 10.0 | 179 | 56.0 | 3.0 | 10.0 | 1.0 | – | – | – | – | 271 |
| Andrej MartinOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 12.0 | 7.0 | 0.0 | 1.0 | 2.0 | 66.0 | 47.0 | 36.0 | 7.0 | 10.0 | 4.0 | 5.0 | 53.0 | 23.0 | 3.0 | 3.0 | – | – | – | – | – | 81.0 |
| Casper RuudOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 10.0 | 13.0 | 1.0 | 4.0 | 4.0 | 74.0 | 39.0 | 27.0 | 21.0 | 11.0 | 2.0 | 3.0 | 79.0 | 24.0 | 0.0 | 7.0 | – | 1.0 | – | – | – | 105 |
| David GoffinOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 6.0 | 12.0 | 0.0 | 4.0 | 0.0 | 64.0 | 38.0 | 22.0 | 15.0 | 9.0 | 4.0 | 7.0 | 58.0 | 17.0 | 0.0 | 6.0 | – | – | – | – | – | 87.0 |
| Diego SchwartzmanOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 6.0 | 12.0 | 0.0 | 4.0 | 3.0 | 55.0 | 33.0 | 16.0 | 8.0 | 9.0 | 0.0 | 5.0 | 63.0 | 25.0 | 2.0 | 8.0 | – | – | – | – | – | 86.0 |
| Dusan LajovicOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 13.0 | 10.0 | 1.0 | 4.0 | 4.0 | 74.0 | 41.0 | 30.0 | 20.0 | 11.0 | 3.0 | 4.0 | 79.0 | 31.0 | 2.0 | 8.0 | – | – | – | – | – | 96.0 |
| Federico DelbonisOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 13.0 | 15.0 | 0.0 | 2.0 | 4.0 | 98.0 | 66.0 | 44.0 | 17.0 | 14.0 | 4.0 | 6.0 | 113 | 41.0 | 1.0 | 19.0 | – | – | – | – | – | 140 |
| Jiri LeheckaOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 15.0 | 16.0 | 1.0 | 12.0 | 1.0 | 96.0 | 70.0 | 48.0 | 13.0 | 14.0 | 8.0 | 10.0 | 99.0 | 34.0 | 3.0 | 6.0 | – | – | – | – | – | 120 |
| Jordan ThompsonOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 8.0 | 12.0 | 0.0 | 3.0 | 5.0 | 57.0 | 36.0 | 28.0 | 10.0 | 10.0 | 4.0 | 6.0 | 52.0 | 12.0 | 0.0 | 0.0 | – | – | – | – | – | 73.0 |
| Liam BroadyOpponent · won 0 of 1 | 1 | 0.0 | 2.0 | 3.0 | 24.0 | 29.0 | 1.0 | 12.0 | 6.0 | 144 | 98.0 | 67.0 | 29.0 | 25.0 | 5.0 | 11.0 | 178 | 64.0 | 4.0 | 14.0 | 1.0 | – | – | – | – | 211 |
| Mackenzie McdonaldOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 7.0 | 12.0 | 0.0 | 3.0 | 4.0 | 58.0 | 36.0 | 27.0 | 5.0 | 9.0 | 2.0 | 6.0 | 57.0 | 18.0 | 1.0 | 3.0 | – | – | – | 1.0 | – | 76.0 |
| Matteo ArnaldiOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 15.0 | 16.0 | 0.0 | 5.0 | 3.0 | 87.0 | 50.0 | 42.0 | 17.0 | 16.0 | 2.0 | 5.0 | 80.0 | 22.0 | 2.0 | 4.0 | – | – | – | – | – | 124 |
| Maximilian MartererOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 9.0 | 13.0 | 0.0 | 9.0 | 0.0 | 57.0 | 37.0 | 31.0 | 8.0 | 11.0 | 0.0 | 2.0 | 61.0 | 15.0 | 0.0 | 1.0 | – | – | – | 1.0 | – | 91.0 |
| Miomir KecmanovicOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 13.0 | 8.0 | 1.0 | 13.0 | 0.0 | 66.0 | 48.0 | 35.0 | 9.0 | 10.0 | 3.0 | 5.0 | 65.0 | 30.0 | 4.0 | 7.0 | – | – | – | 1.0 | – | 89.0 |
| Nicolas JarryOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 16.0 | 16.0 | 1.0 | 8.0 | 1.0 | 93.0 | 68.0 | 50.0 | 13.0 | 16.0 | 5.0 | 7.0 | 93.0 | 30.0 | 2.0 | 7.0 | – | – | – | – | – | 138 |
| Nicolas Moreno De AlboranOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 13.0 | 10.0 | 1.0 | 6.0 | 4.0 | 75.0 | 41.0 | 37.0 | 17.0 | 11.0 | 4.0 | 5.0 | 79.0 | 28.0 | 2.0 | 3.0 | – | 1.0 | – | – | – | 105 |
| Pablo Llamas RuizOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 1.0 | 17.0 | 13.0 | 1.0 | 5.0 | 5.0 | 89.0 | 64.0 | 48.0 | 14.0 | 15.0 | 1.0 | 3.0 | 95.0 | 37.0 | 3.0 | 7.0 | – | 1.0 | – | – | – | 131 |
| Quentin HalysOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 14.0 | 18.0 | 1.0 | 3.0 | 4.0 | 102 | 65.0 | 48.0 | 18.0 | 15.0 | 5.0 | 8.0 | 94.0 | 24.0 | 1.0 | 2.0 | – | – | – | – | – | 129 |
| Sebastian BaezOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 1.0 | 16.0 | 13.0 | 0.0 | 9.0 | 2.0 | 83.0 | 51.0 | 38.0 | 18.0 | 15.0 | 3.0 | 5.0 | 115 | 48.0 | 3.0 | 14.0 | – | – | – | – | – | 134 |
| Sebastian KordaOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 3.0 | 18.0 | 19.0 | 1.0 | 11.0 | 4.0 | 108 | 64.0 | 45.0 | 24.0 | 18.0 | 4.0 | 8.0 | 113 | 44.0 | 4.0 | 10.0 | 1.0 | – | – | – | – | 150 |
| Soon Woo KwonOpponent · won 1 of 1 | 1 | 1.0 | 3.0 | 1.0 | 24.0 | 21.0 | 2.0 | 16.0 | 6.0 | 135 | 94.0 | 69.0 | 21.0 | 22.0 | 6.0 | 10.0 | 149 | 56.0 | 4.0 | 10.0 | 1.0 | – | – | – | – | 190 |
| Stan WawrinkaOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 1.0 | 16.0 | 17.0 | 1.0 | 9.0 | 3.0 | 90.0 | 57.0 | 46.0 | 21.0 | 16.0 | 0.0 | 2.0 | 98.0 | 28.0 | 1.0 | 4.0 | – | – | – | – | – | 121 |
| Stefanos TsitsipasOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 1.0 | 13.0 | 17.0 | 2.0 | 5.0 | 8.0 | 107 | 67.0 | 46.0 | 24.0 | 14.0 | 11.0 | 13.0 | 93.0 | 26.0 | 0.0 | 2.0 | – | – | – | 1.0 | 1.0 | – |
| Sumit NagalOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 16.0 | 14.0 | 1.0 | 9.0 | 5.0 | 98.0 | 67.0 | 46.0 | 14.0 | 15.0 | 11.0 | 14.0 | 97.0 | 41.0 | 4.0 | 8.0 | – | – | – | – | – | 138 |
| Tallon GriekspoorOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 16.0 | 15.0 | 1.0 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1.0 | – | – |
| Tomas Martin EtcheverryOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 13.0 | 10.0 | 1.0 | 7.0 | 2.0 | 66.0 | 47.0 | 35.0 | 13.0 | 11.0 | 0.0 | 1.0 | 83.0 | 32.0 | 2.0 | 7.0 | – | – | – | – | – | 106 |
| Tommy PaulOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 12.0 | 18.0 | 1.0 | 4.0 | 4.0 | 88.0 | 58.0 | 42.0 | 13.0 | 14.0 | 4.0 | 7.0 | 104 | 32.0 | 0.0 | 8.0 | – | 1.0 | – | – | – | 140 |
| HardGround · won 6 of 19 | 19 | 0.3 | 1.2 | 1.5 | 14.2 | 14.6 | 0.8 | 7.1 | 2.7 | 77.6 | 49.5 | 36.3 | 15.0 | 12.3 | 3.5 | 5.6 | 81.6 | 28.2 | 1.8 | 6.5 | 0.2 | 0.2 | 0.1 | 0.2 | 0.1 | 103 |
| ClayGround · won 4 of 9 | 9 | 0.4 | 1.3 | 1.3 | 13.2 | 13.6 | 0.7 | 5.6 | 3.3 | 83.6 | 56.1 | 40.1 | 13.4 | 13.1 | 3.6 | 6.1 | 86.9 | 31.2 | 2.1 | 7.3 | – | 0.2 | – | 0.1 | – | 117 |
| GrassGround · won 1 of 3 | 3 | 0.3 | 1.3 | 1.7 | 15.0 | 17.0 | 0.7 | 6.3 | 5.0 | 91.7 | 58.3 | 41.7 | 19.7 | 15.3 | 4.0 | 7.0 | 103 | 35.7 | 2.0 | 7.3 | 0.3 | – | – | – | – | 127 |
Wins-losses for Klein. Tap a rival for the full head to head.
Stats from official league and public sports feeds. Updated hourly. Tennis history by Jeff Sackmann / Tennis Abstract (CC BY-NC-SA 4.0).