| ATP - Munich | 05/07 14:00 | 29 | [158] Pella, Guido v Alexander Zverev [20] | 4-6,3-6 | |
| ATP - Munich | 05/06 13:30 | 28 | [78] Chung, Hyeon v Pella, Guido [158] | 6-4,5-7,4-6 | |
| ATP - Munich | 05/05 14:05 | 27 | [158] Pella, Guido v Zeballos, Horacio [63] | 6-3,6-7,7-6 | |
| ATP - Munich | 05/04 11:00 | 26 | [29] Fabio Fognini v Pella, Guido [158] | 3-6,2-6 | |
| ATP - Munich | 05/02 13:35 | 25 | [341] Stebe, Cedrik-Marcel v Pella, Guido [158] | 0-6,2-6 | |
| ATP Munich Qual | 04/30 09:00 | - | [265] Mertens, Yannick v Pella, Guido [158] | 3-6,4-6 | |
| ATP Munich Qual | 04/29 09:00 | - | [226] Eysseric, Jonathan v Pella, Guido [158] | 5-7,2-6 | |
| ATP Barcelona Qual | 04/23 13:55 | 46 | [97] Chung, Hyeon v Pella, Guido [148] | 6-2,6-4 | |
| ATP Barcelona Qual | 04/22 13:25 | 45 | Marco Trungelliti v Pella, Guido | 3-6,3-6 | |
| ATP - Miami | 03/26 16:45 | 25 | [55] Mahut, Nicolas v Pella, Guido [158] | 6-4,6-3 | |
| ATP - Miami | 03/25 00:15 | 24 | [158] Pella, Guido v Grigor Dimitrov [13] | 6-3,7-6 | |
| ATP - Miami | 03/23 01:05 | 23 | [158] Pella, Guido v Smyczek, Tim [166] | 3-6,6-4,7-6 | |
| ATP - Indian Wells | 03/12 19:45 | 24 | [6] Rafael Nadal v Pella, Guido [145] | 6-3,6-2 | |
| ATP - Indian Wells | 03/11 02:15 | 23 | [89] Garcia-Lopez, Guillermo v Pella, Guido [145] | 6-4,5-7,2-6 | |
| Sao Paulo, Brazil | 03/03 16:55 | 27 | Pella, Guido v Albert Ramos-Vinolas | 4-6,6-3,4-6 | |
| Sao Paulo, Brazil | 03/01 21:35 | 26 | [67] Berlocq, Carlos v Pella, Guido [166] | 5-7,3-6 | |
| Sao Paulo, Brazil | 02/27 17:45 | 25 | Pella, Guido v Clezar, Guilherme | 6-2,6-3 | |
| ATP - Rio De Janeiro | 02/21 22:35 | 25 | Pella, Guido v Estrella Burgos, Victor | 2-6,5-7 | |
| ATP - Rio De Janeiro | 02/21 21:45 | - | Pella, Guido v Gerald Melzer | Cancelled | |
| ATP - Buenos Aires | 02/14 20:40 | 25 | Albert Ramos-Vinolas v Pella, Guido | 6-7,6-4,7-6 | |
| Coupe Davis | 02/06 13:55 | 26 | [80] Pella, Guido v Fabio Fognini [45] | 6-2,6-4,3-6,4-6,2-6 | |
| Coupe Davis | 02/03 14:00 | 26 | [84] Pella, Guido v Lorenzi, Paolo [43] | 3-6,3-6,3-6 | |
| Open d'Australie, Melbourne, Australie | 01/17 04:40 | 23 | [14] Bautista-Agut, Roberto v Pella, Guido [81] | 6-3,6-1,6-1 | |
| Paris, France | 10/31 10:00 | 24 | [33] Steve Johnson v Pella, Guido [57] | 6-4,7-5 | |
| Basel, Switzerland | 10/27 19:40 | 26 | [72] Zverev, Mischa v Pella, Guido [59] | 6-4,6-2 | |
| Basel, Switzerland | 10/26 13:00 | 25 | [59] Pella, Guido v Richard Gasquet [16] | Retired | |
| Moscow, Russia | 10/19 11:40 | 25 | [45] Andrey Kuznetsov v Pella, Guido [56] | 6-3,5-7,6-2 | |
| Shanghai, Chine | 10/11 07:35 | 24 | [55] Pella, Guido v Sock, Jack [25] | 6-7,5-7 | |
| Pékin, Chine | 10/05 04:30 | 25 | [57] Pella, Guido v Jaziri, Malek [50] | 4-6,4-6 | |
| Coupe Davis | 09/18 12:00 | - | Andy Murray v Pella, Guido | 6-3,6-2,6-3 |