| TT Cup | 09/01 07:10 | - | Chamorro, Miguel v Martinez, Guillermo | W | 1-3 | |
| TT Cup | 09/01 06:10 | - | Miguel Molina v Martinez, Guillermo | L | 3-1 | |
| TT Cup | 08/25 19:40 | - | Martinez, Guillermo v Miguel Molina | L | 0-3 | |
| TT Cup | 08/25 18:40 | - | Martinez, Guillermo v Moises Alvarez | L | 0-3 | |
| TT Cup | 08/25 17:40 | - | Miguel Molina v Martinez, Guillermo | W | 0-3 | |
| TT Cup | 08/25 16:10 | - | Juan P. Sanchez v Martinez, Guillermo | W | 2-3 | |
| TT Cup | 08/25 14:40 | - | Benito, Javier v Martinez, Guillermo | W | 2-3 | |
| TT Cup | 07/18 18:40 | - | Gonzalez, Eduardo v Martinez, Guillermo | L | 3-1 | |
| TT Cup | 07/18 16:40 | - | Miguel Molina v Martinez, Guillermo | L | 3-1 | |
| TT Cup | 07/18 15:10 | - | Soria, Javier v Martinez, Guillermo | L | 3-1 | |
| TT Cup | 07/18 14:10 | - | Chamorro, Miguel v Martinez, Guillermo | L | 3-0 | |
| TT Cup | 07/13 10:40 | - | Martinez, Guillermo v Miguel Molina | L | 2-3 | |
| TT Cup | 07/13 09:40 | - | Soria, Javier v Martinez, Guillermo | L | 3-2 | |
| TT Cup | 07/13 08:10 | - | Juan C Pomares v Martinez, Guillermo | L | 3-1 | |
| TT Cup | 07/13 06:40 | - | Alberto Pomares v Martinez, Guillermo | L | 3-0 | |
| TT Cup | 05/26 11:40 | - | Miguel Molina v Martinez, Guillermo | L | 3-0 | |
| TT Cup | 05/26 10:10 | - | Chamorro, Miguel v Martinez, Guillermo | W | 0-3 | |
| TT Cup | 05/26 09:40 | - | Martinez, Guillermo v Gonzalez, Eduardo | L | 2-3 | |
| TT Cup | 05/26 07:40 | - | Martinez, Guillermo v Miguel Molina | L | 0-3 | |
| TT Cup | 05/26 06:10 | - | Martinez, Guillermo v Moises Alvarez | W | 3-1 | |
| TT Cup | 05/12 11:40 | - | Alberto Lillo v Martinez, Guillermo | L | 3-1 | |
| TT Cup | 05/12 10:10 | - | Miguel Molina v Martinez, Guillermo | W | 0-3 | |
| TT Cup | 05/12 09:40 | - | Martinez, Guillermo v Juan P. Sanchez | W | 3-0 | |
| TT Cup | 05/12 07:40 | - | Martinez, Guillermo v Soria, Javier | L | 1-3 | |
| TT Cup | 05/12 06:10 | - | Martinez, Guillermo v Alberto Lillo | L | 1-3 | |
| ITTF Challenge, Spanish Open 2020, MS | 02/06 13:05 | 6 | Olajide Omotayo v Martinez, Guillermo | L | 4-3 | |
| ITTF Challenge, Spanish Open 2020, MS | 02/05 13:30 | - | Hippler, Tobias v Martinez, Guillermo | W | 1-3 | |
| République tchèque - Extraleague | 03/20 18:20 | - | Martinez, Guillermo v Cissa, Victor | W | 3-0 | |
| Challenger Ochsenhausen | 03/05 12:40 | 1 | Miroslav Horejsi v Martinez, Guillermo | L | 3-0 | |
| Challenger Ochsenhausen | 03/05 08:40 | 1 | Antonin Gavlas v Martinez, Guillermo | L | 3-1 |