| ATP Vienna | 10/24 13:05 | 25 | [17] Anderson, Kevin v Garcia-Lopez, Guillermo [81] | 4-6,4-6 | |
| ATP Vienna Qual | 10/22 11:00 | 46 | [102] Stakhovsky, Sergiy v Garcia-Lopez, Guillermo [82] | 6-3,3-6,1-6 | |
| ATP Vienna Qual | 10/21 13:00 | 45 | [141] Janowicz, Jerzy v Garcia-Lopez, Guillermo [82] | 6-7,4-6 | |
| Challenger Tashkent | 10/14 06:30 | 29 | [105] Garcia-Lopez, Guillermo v Kamil Majchrzak [317] | 6-1,7-6 | |
| Challenger Tashkent | 10/13 08:05 | 28 | [51] Istomin, Denis v Garcia-Lopez, Guillermo [105] | 6-7,4-6 | |
| Challenger Tashkent | 10/12 06:00 | 27 | [105] Garcia-Lopez, Guillermo v Safranek, Vaclav [209] | 6-3,6-3 | |
| Challenger Tashkent | 10/11 06:00 | 26 | Garcia-Lopez, Guillermo v Molchanov, Denys | 7-5,6-1 | |
| Challenger Tashkent | 10/10 06:05 | 25 | Garcia-Lopez, Guillermo v Denis Yevseyev | 6-2,6-3 | |
| Challenger Almaty | 10/05 10:10 | 27 | [110] Garcia-Lopez, Guillermo v Ivan Gakhov [319] | 4-6,1-6 | |
| Challenger Almaty | 10/05 06:00 | 26 | [110] Garcia-Lopez, Guillermo v Nedovyesov, Aleksandr [215] | 6-2,6-1 | |
| Challenger Almaty | 10/03 07:05 | 25 | Garcia-Lopez, Guillermo v Denis Yevseyev | 6-2,6-1 | |
| Rome II, Italy | 09/29 12:35 | 27 | [108] Garcia-Lopez, Guillermo v Filip Krajinovic [105] | 2-6,2-6 | |
| Rome II, Italy | 09/28 13:30 | 26 | [108] Garcia-Lopez, Guillermo v Elliot Benchetrit [468] | 6-0,6-1 | |
| Rome II, Italy | 09/26 09:00 | 25 | [108] Garcia-Lopez, Guillermo v Gastao Elias [147] | 7-6,3-6,6-2 | |
| Genoa, Italy | 09/10 16:00 | 29 | [161] Stefanos Tsitsipas v Garcia-Lopez, Guillermo [123] | 7-5,7-6 | |
| Genoa, Italy | 09/09 08:00 | 28 | [123] Garcia-Lopez, Guillermo v Stefano Napolitano [190] | 6-2,6-7,6-3 | |
| Genoa, Italy | 09/08 12:00 | 27 | [438] Donati, Matteo v Garcia-Lopez, Guillermo [123] | 4-6,2-6 | |
| Genoa, Italy | 09/07 12:25 | 26 | [123] Garcia-Lopez, Guillermo v Alessandro Giannessi [91] | 6-4,7-5 | |
| Genoa, Italy | 09/06 10:30 | 25 | [356] Eysseric, Jonathan v Garcia-Lopez, Guillermo [123] | 4-6,1-6 | |
| Challenger Como | 08/31 10:35 | 26 | [123] Garcia-Lopez, Guillermo v Corentin Moutet [342] | 4-6,3-6 | |
| Challenger Como | 08/29 16:10 | 25 | [123] Garcia-Lopez, Guillermo v Jaume Munar [208] | Retired | |
| Challenger Manerbio | 08/27 14:15 | 29 | Garcia-Lopez, Guillermo v Roberto Carballes Baena | 4-6,6-2,2-6 | |
| Challenger Manerbio | 08/26 13:00 | 28 | [136] Garcia-Lopez, Guillermo v Elias Ymer [211] | 6-4,3-6,6-4 | |
| Challenger Manerbio | 08/25 11:30 | 27 | [136] Garcia-Lopez, Guillermo v Oscar Otte [145] | 7-6,6-0 | |
| Challenger Manerbio | 08/23 15:55 | 26 | [136] Garcia-Lopez, Guillermo v Petrovic, Danilo [286] | 6-4,1-6,6-3 | |
| Challenger Manerbio | 08/22 11:45 | 25 | [136] Garcia-Lopez, Guillermo v Hampel, Lenny [371] | 6-4,6-3 | |
| Cordenons, Italy | 08/15 18:45 | 25 | Petrovic, Danilo v Garcia-Lopez, Guillermo | 7-6,6-2 | |
| Challenger Biella | 08/02 12:35 | 26 | Salvatore Caruso v Garcia-Lopez, Guillermo | 1-6,6-4,6-2 | |
| Challenger Biella | 07/31 10:25 | 25 | Lorenzo Sonego v Garcia-Lopez, Guillermo | 3-6,6-2,4-6 | |
| Challenger Tampere | 07/26 14:35 | 26 | Reuter, Yannik v Garcia-Lopez, Guillermo | 4-6,6-4,7-6 |