| Milan, Italy | 06/21 15:00 | 25 | [279] Garcia-Lopez, Guillermo v Ulises Blanch [247] | 6-3,3-6,2-6 | |
| Challenger Gran Canaria | 03/02 16:00 | 25 | [483] Esteve Lobato, Eduard v Garcia-Lopez, Guillermo [235] | 7-6,6-2 | |
| Challenger Gran Canaria | 02/23 17:20 | 25 | [284] Andrea Pellegrino v Garcia-Lopez, Guillermo [232] | 6-4,6-3 | |
| Open d'Australie | 01/10 11:10 | 60 | [222] Garcia-Lopez, Guillermo v Francisco Cerundolo [139] | 2-6,4-6 | |
| Alicante, Spain | 10/14 10:45 | 26 | [97] Pedro Martinez v Garcia-Lopez, Guillermo [222] | 6-4,6-0 | |
| Alicante, Spain | 10/12 10:25 | 25 | [201] Brandon Nakashima v Garcia-Lopez, Guillermo [215] | 4-6,3-6 | |
| Challenger Biella | 09/29 11:30 | 25 | [215] Garcia-Lopez, Guillermo v Juan Pablo Ficovich [206] | 3-6,2-6 | |
| French Open, Paris, France | 09/21 14:05 | 14 | [212] Garcia-Lopez, Guillermo v Kimmer Coppejans [160] | 6-0,5-7,3-6 | |
| Spanish Summer League | 08/02 08:30 | - | [138] Ilya Ivashka v Garcia-Lopez, Guillermo [203] | 2-6,4-6 | |
| Spanish Summer League | 08/01 10:40 | - | [203] Garcia-Lopez, Guillermo v Steven Diez [165] | 3-6,6-2,6-3 | |
| Spanish Summer League | 07/31 18:20 | - | [347] Oriol Roca Batalla v Garcia-Lopez, Guillermo [203] | 5-7,4-6 | |
| Spanish Summer League | 07/30 15:00 | - | Timofey Skatov v Garcia-Lopez, Guillermo | 6-4,3-6,3-6 | |
| Spanish Summer League | 07/24 08:00 | - | [318] Alcaraz Garfia, Carlos v Garcia-Lopez, Guillermo [203] | 6-1,4-6,6-3 | |
| Spanish Summer League | 07/23 09:30 | - | Canas Garcia, Juan Pablo v Garcia-Lopez, Guillermo | 4-6,0-6 | |
| ATP - Delray Beach | 02/15 16:30 | 64 | [163] Garcia-Lopez, Guillermo v Istomin, Denis [161] | 5-7,2-6 | |
| New York, USA | 02/09 18:30 | 64 | [115] Lorenzi, Paolo v Garcia-Lopez, Guillermo [165] | 7-5,6-3 | |
| ATP - Montpellier | 02/03 11:00 | 164 | [165] Garcia-Lopez, Guillermo v Enzo Couacaud [214] | 3-6,3-6 | |
| ATP - Montpellier | 02/02 09:30 | 64 | [160] Garcia-Lopez, Guillermo v Brown, Dustin [203] | 6-3,6-3 | |
| Challenger - Quimper | 01/30 13:45 | 26 | [160] Garcia-Lopez, Guillermo v Zdenek Kolar [227] | 4-6,3-6 | |
| Challenger - Quimper | 01/29 12:25 | 25 | Garcia-Lopez, Guillermo v Kamke, Tobias | 1-6,6-3,6-4 | |
| Open d'Australie | 01/15 03:45 | 44 | [175] Tallon Griekspoor v Garcia-Lopez, Guillermo [160] | 6-3,6-2 | |
| Challenger Canberra | 01/06 23:00 | 24 | [124] Maden, Yannick v Garcia-Lopez, Guillermo [151] | 7-6,6-3 | |
| Challenger Maia | 11/20 14:25 | 25 | [143] Garcia-Lopez, Guillermo v Constant Lestienne [242] | 4-6,3-6 | |
| Helsinki, Finland | 11/13 13:25 | 25 | [145] Garcia-Lopez, Guillermo v Alexandre Muller [237] | 3-6,3-6 | |
| Brest, France | 10/24 10:35 | 26 | [142] Garcia-Lopez, Guillermo v Roberto Carballes Baena [81] | 5-7,6-7 | |
| Brest, France | 10/23 13:45 | 25 | [142] Garcia-Lopez, Guillermo v Pavel Kotov [256] | 6-4,3-6,6-3 | |
| Challenger Seville | 09/13 11:20 | 27 | [112] Jaume Munar v Garcia-Lopez, Guillermo [150] | Walkover | |
| Challenger Seville | 09/12 11:00 | 26 | [190] Vilella Martinez, Mario v Garcia-Lopez, Guillermo [150] | 6-1,6-7,4-6 | |
| Challenger Seville | 09/11 12:25 | 25 | Ojeda Lara, Ricardo v Garcia-Lopez, Guillermo | 5-7,3-6 | |
| Genoa, Italy | 09/02 11:50 | 24 | [167] Sebastian Ofner v Garcia-Lopez, Guillermo [165] | 6-2,6-2 |