| Challenger Lyon | 06/11 13:10 | 27 | [113] Taro Daniel v Daniel Altmaier [145] | 7-6,6-7,6-3 | |
| Challenger Lyon | 06/09 16:20 | 26 | [145] Daniel Altmaier v Daniel Elahi Galan [107] | 6-4,3-6,7-6 | |
| Challenger Lyon | 06/07 09:25 | 25 | [145] Daniel Altmaier v Alexandre Muller [191] | 6-3,6-2 | |
| Challenger - Biella | 06/01 14:50 | 25 | [291] Holger Vitus Nodskov Rune v Daniel Altmaier [145] | 6-2,6-7,7-6 | |
| ATP - Parma | 05/25 14:00 | 25 | [51] Richard Gasquet v Daniel Altmaier [145] | 6-3,6-3 | |
| ATP - Parma | 05/23 10:00 | 19 | [87] Norbert Gombos v Daniel Altmaier [144] | 6-7,6-7 | |
| ATP - Parma | 05/22 11:15 | 14 | [270] Pavel Kotov v Daniel Altmaier [144] | 3-6,1-6 | |
| ATP - Genebra | 05/18 09:00 | 25 | [61] Feliciano Lopez v Daniel Altmaier [144] | 7-6,6-4 | |
| ATP - Genebra | 05/16 12:00 | 19 | [100] Marco Cecchinato v Daniel Altmaier [144] | 6-1,7-6 | |
| ATP - Genebra | 05/15 08:00 | 14 | [160] Marc-Andrea Huesler v Daniel Altmaier [144] | 6-7,2-6 | |
| Challenger - Heilbronn | 05/10 14:30 | 25 | [144] Daniel Altmaier v Taro Daniel [112] | 5-7,0-6 | |
| ATP - Miami | 03/22 19:05 | 14 | [144] Daniel Altmaier v Shintaro Mochizuki [427] | Retired | |
| Challenger - Santiago | 03/17 16:10 | 26 | [142] Daniel Altmaier v Camilo Ugo Carabelli [353] | 4-6,6-3,3-6 | |
| Challenger - Santiago | 03/15 17:00 | 25 | [142] Daniel Altmaier v Guido Andreozzi [199] | 6-4,6-3 | |
| ATP - Santiago | 03/08 17:05 | 25 | [121] Daniel Elahi Galan v Daniel Altmaier [143] | 7-6,3-6,7-5 | |
| ATP - Buenos Aires | 03/01 14:00 | 19 | [106] Jaume Munar v Daniel Altmaier [141] | 6-3,6-4 | |
| ATP - Buenos Aires | 02/28 16:10 | 15 | [168] Juan P Varillas v Daniel Altmaier [137] | 4-6,7-6,5-7 | |
| ATP - Buenos Aires | 02/27 17:35 | 14 | [315] Orlando Luz v Daniel Altmaier [137] | 4-6,7-5,2-6 | |
| Challenger - Concepción | 02/19 15:00 | 27 | [134] Daniel Altmaier v Andrej Martin [103] | 6-7,3-6 | |
| Challenger - Concepción | 02/18 16:15 | 26 | [134] Daniel Altmaier v Lukas Klein [297] | 1-6,6-3,6-3 | |
| Challenger - Concepción | 02/16 17:15 | 25 | [134] Daniel Altmaier v Juan Manuel Cerundolo [332] | 4-6,6-2,6-1 | |
| Challenger - Antália | 02/02 07:30 | 25 | [132] Daniel Altmaier v Alessandro Giannessi [165] | 6-7,2-6 | |
| Challenger - Antália | 01/28 11:15 | 25 | [150] Paolo Lorenzi v Daniel Altmaier [132] | 6-4,6-2 | |
| Challenger - Hamburgo | 10/28 12:45 | 25 | [220] Illya Marchenko v Daniel Altmaier [125] | Retired | |
| Challenger - Hamburgo | 10/28 12:45 | 25 | Daniel Masur v Daniel Altmaier | Cancelled | |
| ATP - Colónia 2 | 10/19 16:00 | 25 | [85] Egor Gerasimov v Daniel Altmaier [122] | 6-1,6-0 | |
| ATP - Colónia | 10/13 12:00 | 25 | [122] Daniel Altmaier v Henri Laaksonen [139] | 6-3,3-6,6-7 | |
| Open de França | 10/05 18:30 | 26 | [18] Pablo Carreño Busta v Daniel Altmaier [186] | 6-2,7-5,6-2 | |
| Open de França | 10/03 09:00 | 25 | [186] Daniel Altmaier v Matteo Berrettini [8] | 6-2,7-6,6-4 | |
| Open de França | 10/01 10:30 | 24 | [32] Jan-Lennard Struff v Daniel Altmaier [186] | 3-6,6-7,3-6 |
Wikipedia - Daniel Altmaier
Daniel Altmaier (German pronunciation: [ˈdaːni̯eːl ˈaltmaɪ̯ɐ]; born 12 September 1998) is a German professional tennis player. He has a career high ATP singles ranking of world No. 47, achieved on 2 October 2023. He is the current German No. 3.