| 27.11.25 | 1/4 | Pranav Kumar/Noah Schachter | Alexander Merino/Christoph Negritu | 6-4, 6-4 |  | match details | Temuco Challenger | Difícil |
| 29.10.25 | 1er ronda | Giles Hussey/Pedro Vives Marcos | Alexander Merino/Christoph Negritu | 6-3, 6-4 |  | match details | Monastir Challenger | Difícil |
| 15.10.25 | 1er ronda | Vlad Victor Cornea/Bruno Pujol Navarro | Alexander Merino/Christoph Negritu | 6-2, 6-4 |  | match details | Olbia Challenger | Difícil |
| 01.10.25 | 1er ronda | Theo Arribage/Constantin Frantzen | Alexander Merino/Christoph Negritu | 6-4, 6-4 |  | match details | Villena Challenger | Difícil |
| 12.03.25 | 1er ronda | Khumoun Sultanov/Vladimir Uzhylovsky | Alexander Merino/Christoph Negritu | 6-4, 0-6, 10-7 |  | match details | Hersonissos 2 | Difícil |
| 05.03.25 | 1er ronda | Dimitar Kuzmanov/Timofey Skatov | Alexander Merino/Christoph Negritu | 7-5, 6-1 |  | match details | Hersonissos 1 | Difícil |
| 15.02.25 | fin | Alexander Merino/Christoph Negritu | Daniel Cukierman/Joshua Paris | 2-6, 6-3, 10-8 |  | match details | Tenerife 2 | Difícil |
| 14.02.25 | 1/2 | Alexander Merino/Christoph Negritu | Inigo Cervantes/Daniel Rincon | 7-65, 6-4 |  | match details |
| 13.02.25 | 1/4 | Alexander Merino/Christoph Negritu | Marco Bortolotti/Luis David Martinez | 4-6, 6-2, 10-8 |  | match details |
| 11.02.25 | 1er ronda | Alexander Merino/Christoph Negritu | Benjamin Hassan/David Vega Hernandez | 6-3, 6-2 |  | match details |
| 06.02.25 | 1/4 | Scott Duncan/Mircea-Alexandru Jecan | Alexander Merino/Christoph Negritu | 7-5, 6-2 |  | match details | Tenerife 1 | Difícil |
| 04.02.25 | 1er ronda | Alexander Merino/Christoph Negritu | Edas Butvilas/Vilius Gaubas | 6-4, 6-4 |  | match details |
| 29.11.24 | 1/4 | Shintaro Mochizuki/Rei Sakamoto | Alexander Merino/Christoph Negritu | 3-6, 7-63, 10-7 |  | match details | Yokkaichi Challenger | Difícil |
| 28.11.24 | 1er ronda | Alexander Merino/Christoph Negritu | Masamichi Imamura/Kaichi Uchida | 4-6, 6-2, 10-8 |  | match details |
| 21.11.24 | 1er ronda | Ji Sung Nam/Matthew Christopher Romios | Alexander Merino/Christoph Negritu | 5-7, 6-4, 10-4 |  | match details | Yokohama Challenger | Difícil |
| 06.11.24 | 1er ronda | Tristan Schoolkate/Li Tu | Alexander Merino/Christoph Negritu | 7-62, 6-2 |  | match details | Matsuyama Challenger | Difícil |
| 03.10.24 | 1/4 | Romain Arneodo/Inigo Cervantes | Alexander Merino/Christoph Negritu | 7-63, 6-4 |  | match details | Villena Challenger | Difícil |
| 01.10.24 | 1er ronda | Alexander Merino/Christoph Negritu | Sander Arends/Luke Johnson | 6-1, 3-6, 10-8 |  | match details |
| 15.03.24 | 1/2 | Federico Cina/Fabio De Michele | Alexander Merino/Christoph Negritu | 6-3, 3-6, 10-3 |  | match details | M15 Monastir | Difícil |
| 14.03.24 | 1/4 | Alexander Merino/Christoph Negritu | Jordan Chiu/Daniel De Jonge | 6-3, 6-4 |  | match details |
| 12.03.24 | 1er ronda | Alexander Merino/Christoph Negritu | Romain Faucon/Jack Loge | 6-2, 6-2 |  | match details |
| 09.03.24 | fin | Alexander Merino/Christoph Negritu | Igor Kudriashov/Aleksandr Lobanov | 7-64, 4-6, 10-4 |  | match details | M15 Monastir | Difícil |
| 08.03.24 | 1/2 | Alexander Merino/Christoph Negritu | Simon Beaupain/Jack Loge | 6-4, 6-3 |  | match details |
| 07.03.24 | 1/4 | Alexander Merino/Christoph Negritu | Romain Faucon/Benjamin Pietri | 6-3, 6-0 |  | match details |
| 06.03.24 | 1er ronda | Alexander Merino/Christoph Negritu | Lucas Andriamasilalao/Adan Freire Da Silva | 6-4, 6-1 |  | match details |
| 03.03.24 | fin | Alexander Merino/Christoph Negritu | Milos Karol/Fred Simonsson | 7-63, 6-3 |  | match details | M15 Monastir | Difícil |
| 02.03.24 | 1/2 | Alexander Merino/Christoph Negritu | Igor Kudriashov/Aleksandr Lobanov | 6-3, 7-62 |  | match details |
| 01.03.24 | 1/4 | Alexander Merino/Christoph Negritu | Simon Beaupain/Romain Faucon | 6-4, 7-64 |  | match details |
| 27.02.24 | 1er ronda | Alexander Merino/Christoph Negritu | Alexander Brown/Ezekiel Clark | 6-78, 6-3, 10-7 |  | match details |
| 24.02.24 | fin | Alexander Merino/Christoph Negritu | Milos Karol/Jakub Paul | 6-3, 6-3 |  | match details | M15 Monastir | Difícil |
| 23.02.24 | 1/2 | Alexander Merino/Christoph Negritu | Igor Kudriashov/Aleksandr Lobanov | 6-3, 6-4 |  | match details |
| 22.02.24 | 1er ronda | Alexander Merino/Christoph Negritu | Alexander Brown/Ezekiel Clark | 6-3, 6-4 |  | match details |
| 22.02.24 | 1/4 | Alexander Merino/Christoph Negritu | Areg Stepanian/Michael Zhu | 6-3, 6-4 |  | match details |
| 25.11.23 | fin | Alexander Merino/Christoph Negritu | Milos Karol/Adrian Oetzbach | 6-3, 6-1 |  | match details | M15 Monastir | Difícil |
| 25.11.23 | 1/2 | Alexander Merino/Christoph Negritu | Petr Brunclik/Jakub Filip | 5-7, 6-3, 10-6 |  | match details |
| 24.11.23 | 1er ronda | Alexander Merino/Christoph Negritu | Aaron Gil Garcia/Frederic Schlossmann | 1-2, Aaron Gil Garcia/Frederic Schlossmann - retirado |  | match details |
| 24.11.23 | 1/4 | Alexander Merino/Christoph Negritu | Cesar Bourgois/Louis Tessa | 6-1, 3-6, 10-7 |  | match details |
| 18.11.23 | fin | Jakub Paul/Jakob Schnaitter | Alexander Merino/Christoph Negritu | 7-65, 7-5 |  | match details | M15 Monastir | Difícil |
| 17.11.23 | 1/2 | Alexander Merino/Christoph Negritu | Egor Agafonov/Alexander Donski | 6-3, 6-4 |  | match details |
| 16.11.23 | 1/4 | Alexander Merino/Christoph Negritu | Jasza Szajrych/Marcel Zielinski | 6-4, 6-2 |  | match details |
| 15.11.23 | 1er ronda | Alexander Merino/Christoph Negritu | Adriano Dzhenev/Saba George Nanobashvili | 6-2, 6-1 |  | match details |
| 11.11.23 | fin | Egor Agafonov/Bogdan Bobrov | Alexander Merino/Christoph Negritu | 6-3, 4-6, 10-3 |  | match details | M15 Monastir | Difícil |
| 10.11.23 | 1/2 | Alexander Merino/Christoph Negritu | Adriano Dzhenev/Nicolas Kobelt | 6-1, 6-1 |  | match details |
| 09.11.23 | 1/4 | Alexander Merino/Christoph Negritu | Matthew William Donald/Liam Gavrielides | 7-5, 7-5 |  | match details |
| 07.11.23 | 1er ronda | Alexander Merino/Christoph Negritu | Tom Gentzsch/Maik Steiner | 6-4, 6-1 |  | match details |
| 03.11.23 | 1/2 | Daniel De Jonge/John Sperle | Alexander Merino/Christoph Negritu | 6-3, 6-4 |  | match details | M15 Monastir | Difícil |
| 02.11.23 | 1/4 | Alexander Merino/Christoph Negritu | Romain Faucon/Nicolas Tepmahc | 6-3, 6-4 |  | match details |
| 31.10.23 | 1er ronda | Alexander Merino/Christoph Negritu | Sven Corbinais/Diego Fernandez Flores | 4-6, 7-5, 10-7 |  | match details |
| 18.06.23 | fin | Gilbert Klier Junior/Christian Oliveira | Alexander Merino/Christoph Negritu | 7-5, 6-4 |  | match details | M15 Monastir | Difícil |
| 16.06.23 | 1/2 | Alexander Merino/Christoph Negritu | Arthur Bouquier/Nicolas Tepmahc | 6-4, 6-2 |  | match details |
| 15.06.23 | 1/4 | Alexander Merino/Christoph Negritu | Filip Peliwo/Cyril Vandermeersch | 6-4, 6-2 |  | match details |
| 13.06.23 | 1er ronda | Alexander Merino/Christoph Negritu | Madhwin Kamath/Dharmil Shah | 6-4, 6-1 |  | match details |
| 10.06.23 | fin | Alexander Merino/Christoph Negritu | Arthur Bouquier/Raphael Lambling | 7-5, 6-1 |  | match details | M15 Monastir | Difícil |
| 09.06.23 | 1/2 | Alexander Merino/Christoph Negritu | Billy Blaydes/Freddy Blaydes | 7-65, 3-6, 10-7 |  | match details |
| 09.06.23 | 1/4 | Alexander Merino/Christoph Negritu | Tao Mu/Tiago Pereira | 6-4, 7-5 |  | match details |
| 06.06.23 | 1er ronda | Alexander Merino/Christoph Negritu | Sam Bird/Ioan Alexandru Teglas | 6-2, 6-2 |  | match details |
| 25.02.19 | fin | Alexis Klegou/David Pichler | Alexander Merino/Christoph Negritu | 6-4, 6-3 |  | match details | M15 Monastir | Difícil |
| 25.02.19 | 1/2 | Alexander Merino/Christoph Negritu | Marek Gengel/Petr Nouza | 6-3, 6-4 |  | match details |
| 25.02.19 | 1er ronda | Alexander Merino/Christoph Negritu | Julian Ocleppo/Francesco Vilardo | 2-6, 6-4, 13-11 |  | match details |
| 25.02.19 | 1/4 | Alexander Merino/Christoph Negritu | Christian Hirschmueller/Louis Wessels | 6-4, 6-1 |  | match details |
| 18.02.19 | 1er ronda | Erik Crepaldi/Yanais Laurent | Alexander Merino/Christoph Negritu | 7-64, 7-64 |  | match details | M15 Monastir | Difícil |
| 17.09.18 | 1/4 | Alexander Merino/Christoph Negritu | Jorge Blanco Guadalupe/Luke Jacob Gamble | 7-62, 6-3 |  | match details | Tunisia F32 | Difícil |
| 17.09.18 | 1/2 | Alexander Merino/Christoph Negritu | Ivan Liutarevich/Kai Wehnelt | 7-5, 4-6, 10-4 |  | match details |
| 17.09.18 | fin | Anis Ghorbel/Vasko Mladenov | Alexander Merino/Christoph Negritu | 6-3, 6-3 |  | match details |
| 17.09.18 | 1er ronda | Alexander Merino/Christoph Negritu | Mathieu Garcia/Errol Smith | 6-3, 6-4 |  | match details |
| 10.09.18 | 1er ronda | Alexander Merino/Christoph Negritu | Andrea Borroni/Mattia Rossi | 6-4, 6-4 |  | match details | Tunisia F31 | Difícil |
| 10.09.18 | 1/2 | Juan Manuel Benitez Chavarriaga/Jorge Blanco Guadalupe | Alexander Merino/Christoph Negritu | 7-64, 6-4 |  | match details |
| 10.09.18 | 1/4 | Alexander Merino/Christoph Negritu | Maxim Krapivin/Andrei Levine | 6-1, 7-66 |  | match details |
| 03.09.18 | 1/4 | Alexander Merino/Christoph Negritu | Juan Manuel Benitez Chavarriaga/Preston Brown | 6-1, 6-3 |  | match details | Tunisia F30 | Difícil |
| 03.09.18 | 1/2 | Alexander Merino/Christoph Negritu | Anis Ghorbel/Aziz Ouakaa | 6-1, 6-3 |  | match details |
| 03.09.18 | fin | Alexander Merino/Christoph Negritu | Jorge Blanco Guadalupe/Joy Vigani | 6-3, 6-1 |  | match details |
| 03.09.18 | 1er ronda | Alexander Merino/Christoph Negritu | Maxim Turyev/Robert Ziganshin | 6-2, 6-2 |  | match details |
| 14.11.16 | fin | Gabor Borsos/Luca Margaroli | Alexander Merino/Christoph Negritu | 7-66, 5-7, 10-5 |  | match details | South Africa | Difícil |
| 14.11.16 | 1/4 | Alexander Merino/Christoph Negritu | Johannes Myburgh/Louis Pretorius | 6-1, 6-4 |  | match details |
| 14.11.16 | 1/2 | Alexander Merino/Christoph Negritu | Joe Cooper/Matt Seeberger | 6-4, 6-3 |  | match details |
| 14.11.16 | 1er ronda | Alexander Merino/Christoph Negritu | Sebastian Prechtel/Philipp Schroll | 6-3, 6-2 |  | match details |
| 07.11.16 | 1er ronda | Alexander Merino/Christoph Negritu | Joe Cooper/Matt Seeberger | 4-6, 6-4, 10-7 |  | match details | South Africa | Difícil |
| 07.11.16 | 1/4 | Alexander Merino/Christoph Negritu | Lloyd Harris/Peter-John Nomdo | Lloyd Harris/Peter-John Nomdo - walk over |  | match details |
| 07.11.16 | 1/2 | Gabor Borsos/Luca Margaroli | Alexander Merino/Christoph Negritu | 6-2, 6-4 |  | match details |
| 31.10.16 | 1/2 | Alessandro Bega/Luca Margaroli | Alexander Merino/Christoph Negritu | 6-75, 6-4, 10-5 |  | match details | South Africa | Difícil |
| 31.10.16 | 1er ronda | Alexander Merino/Christoph Negritu | Riaan Du Toit/Nicholas Kamisar | 6-4, 6-3 |  | match details |
| 31.10.16 | 1/4 | Alexander Merino/Christoph Negritu | Bernd Kossler/Sebastian Prechtel | Bernd Kossler/Sebastian Prechtel - walk over |  | match details |
| 07.09.15 | 1/4 | Romain Bauvy/Ugo Nastasi | Alexander Merino/Christoph Negritu | 6-3, 6-2 |  | match details | Tunisia F22 | Difícil |
| 07.09.15 | 1er ronda | Alexander Merino/Christoph Negritu | Giacomo Miccini/Marco Stancati | Giacomo Miccini/Marco Stancati - walk over |  | match details |