| ATP Madryt | 04/26 09:00 | 24 | [16] Tommy Paul v Lukas Klein [120] | 6-7,6-1,6-4 | |
| ATP Madryt | 04/24 17:45 | 23 | [120] Lukas Klein v Pablo Llamas Ruiz [146] | 6-1,4-6,7-6 | |
| ATP Madryt | 04/23 09:00 | 15 | [104] Thiago Agustin Tirante v Lukas Klein [120] | 3-6,3-6 | |
| ATP Madryt | 04/22 08:00 | 14 | [454] Pol Martin Tiffon v Lukas Klein [120] | 3-6,2-6 | |
| Challenger Split | 04/09 11:20 | 25 | [118] Lukas Klein v Elmer Moller [368] | 6-7,3-6 | |
| ATP Estoril | 03/31 11:00 | 19 | [128] Lukas Klein v Jaime Faria [287] | 4-6,7-6,1-6 | |
| ATP Estoril | 03/30 12:00 | 14 | Lukas Klein v Pedro Araujo | 6-3,6-0 | |
| ATP Miami | 03/21 00:35 | 23 | [73] Alex Michelsen v Lukas Klein [128] | 7-6,6-2 | |
| ATP Miami | 03/19 18:45 | 15 | [70] Jakub Mensik v Lukas Klein [128] | 6-7,5-7 | |
| ATP Miami | 03/18 19:50 | 14 | [128] Lukas Klein v Benoit Paire [138] | 6-1,7-6 | |
| ATP Indian Wells | 03/10 02:00 | 24 | [9] Casper Ruud v Lukas Klein [141] | 6-4,7-6 | |
| ATP Indian Wells | 03/08 23:40 | 23 | [166] Nicolas Moreno De Alboran v Lukas Klein [141] | 6-7,4-6 | |
| ATP Indian Wells | 03/05 18:00 | 15 | [141] Lukas Klein v Zachary Svajda [143] | 6-4,6-7,6-3 | |
| ATP Indian Wells | 03/04 19:55 | 14 | [95] Maximilian Marterer v Lukas Klein [141] | 2-6,4-6 | |
| ATP Doha | 02/18 12:30 | 19 | [73] Alexandre Muller v Lukas Klein [140] | 6-4,6-4 | |
| ATP Doha | 02/17 10:35 | 14 | [189] Beibit Zhukayev v Lukas Klein [140] | 4-6,3-6 | |
| Challenger Manama | 02/13 08:00 | 25 | [140] Lukas Klein v Marco Trungelliti [229] | 4-6,6-3,3-6 | |
| Puchar Davisa | 02/03 14:55 | 168 | Dusan Lajovic v Lukas Klein | Cancelled | |
| Puchar Davisa | 02/02 14:00 | 168 | [41] Miomir Kecmanovic v Lukas Klein [142] | 6-7,2-6 | |
| Australian Open | 01/18 00:00 | 24 | [6] Alexander Zverev v Lukas Klein [163] | 7-5,3-6,4-6,7-6,7-6 | |
| Australian Open | 01/16 02:00 | 23 | Soonwoo Kwon v Lukas Klein | 6-7,6-4,6-7,3-6 | |
| Australian Open | 01/11 23:00 | 19 | [164] Lukas Klein v Stefano Napolitano [229] | 7-6,7-6 | |
| Australian Open | 01/11 01:05 | 15 | [165] Denis Kudla v Lukas Klein [164] | 3-6,7-6,4-6 | |
| Australian Open | 01/09 06:25 | 14 | [226] Marco Trungelliti v Lukas Klein [164] | 3-6,6-3,3-6 | |
| ATP Brisbane | 01/03 03:00 | 26 | [44] Matteo Arnaldi v Lukas Klein [170] | 6-4,3-6,7-5 | |
| ATP Brisbane | 01/02 05:00 | 25 | [171] Lukas Klein v Sebastian Baez [28] | 4-6,6-3,6-4 | |
| ATP Brisbane | 12/31 01:00 | 19 | [171] Lukas Klein v Maxime Cressy [126] | 4-6,7-6,6-4 | |
| ATP Brisbane | 12/30 01:45 | 14 | [100] Quentin Halys v Lukas Klein [171] | 4-6,6-7 | |
| Czechy - Extraliga | 12/16 12:05 | - | Lukas Klein v Dominik Kellovsky | 7-6,6-1 | |
| Challenger Ismaning | 11/04 13:15 | 28 | [179] Lukas Klein v Maximilian Marterer [105] | 4-6,4-6 |
Wikipedia - Lukáš Klein
Lukáš Klein (ur. 22 marca 1998 w Nowej Wsi Spiskiej) – słowacki tenisista.
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