| Challenger Bratysława | 11/07 17:10 | 25 | [125] Jerzy Janowicz v Norbert Gombos [113] | 3-6,7-5,7-6 | |
| Challenger Eckental | 11/05 13:00 | 29 | [136] Jerzy Janowicz v Maximilian Marterer [106] | 6-7,6-3,3-6 | |
| Challenger Eckental | 11/04 12:55 | 28 | [136] Jerzy Janowicz v Matthias Bachinger [194] | 6-7,6-4,6-3 | |
| Challenger Eckental | 11/03 11:00 | 27 | [86] Ruben Bemelmans v Jerzy Janowicz [136] | 4-6,4-6 | |
| Challenger Eckental | 11/02 12:30 | 26 | Igor Sijsling v Jerzy Janowicz | 6-7,3-6 | |
| Challenger Eckental | 11/01 10:00 | 25 | Felix Auger Aliassime v Jerzy Janowicz | 6-7,1-6 | |
| ATP Vienna Qual | 10/21 13:00 | 45 | [141] Jerzy Janowicz v Guillermo Garcia-Lopez [82] | 6-7,4-6 | |
| ATP Sztokholm | 10/19 16:30 | 26 | [8] Grigor Dimitrov v Jerzy Janowicz [141] | 7-5,7-6 | |
| ATP Sztokholm | 10/18 10:00 | 25 | [85] Pierre-Hugues Herbert v Jerzy Janowicz [141] | 2-6,6-3,3-6 | |
| ATP Stockholm Qual | 10/16 13:45 | - | [141] Jerzy Janowicz v Jurgen Zopp [180] | 6-1,6-7,6-4 | |
| ATP Stockholm Qual | 10/15 15:15 | 26 | [145] Jerzy Janowicz v Andrea Arnaboldi [216] | 6-7,7-5,6-1 | |
| Challenger Ortisei | 10/10 17:10 | 25 | [145] Jerzy Janowicz v Andreas Seppi [85] | 2-6,2-6 | |
| Challenger Orleans | 09/25 10:50 | 25 | [109] Marton Fucsovics v Jerzy Janowicz [145] | 7-6,7-6 | |
| Challenger Szczecin | 09/15 15:00 | 27 | [149] Jerzy Janowicz v Florian Mayer [69] | 2-6,6-7 | |
| Challenger Szczecin | 09/13 17:45 | 26 | [149] Jerzy Janowicz v Kenny de Schepper [183] | 6-1,7-6 | |
| Challenger Szczecin | 09/12 15:00 | 25 | [149] Jerzy Janowicz v Guillermo Duran [68] | 6-4,6-1 | |
| Challenger Como | 08/31 08:30 | 26 | [438] Matteo Donati v Jerzy Janowicz [110] | 7-6,7-6 | |
| Challenger Como | 08/29 11:40 | 25 | [251] Kamil Majchrzak v Jerzy Janowicz [110] | 3-6,4-6 | |
| ATP Kitzbuhel Qual | 07/29 10:25 | 45 | Jerzy Janowicz v Michael Linzer | 1-6,4-6 | |
| Challenger Poznań | 07/20 14:00 | 26 | [283] Goncalo Oliveira v Jerzy Janowicz [107] | 5-7,6-2,6-4 | |
| Challenger Poznań | 07/18 14:30 | 25 | [264] Jaume Munar v Jerzy Janowicz [107] | 6-7,2-6 | |
| Challenger Braunschweig | 07/13 14:20 | 27 | [170] Oscar Otte v Jerzy Janowicz [141] | 4-6,7-5,6-4 | |
| Challenger Braunschweig | 07/13 09:45 | 26 | [141] Jerzy Janowicz v Gastao Elias [115] | 6-4,7-6 | |
| Challenger Braunschweig | 07/11 09:00 | 25 | [131] Uladzimir Ignatik v Jerzy Janowicz [141] | 4-6,4-6 | |
| Wimbledon | 07/07 13:55 | 25 | [46] Benoit Paire v Jerzy Janowicz [141] | 6-2,7-6,6-3 | |
| Wimbledon | 07/05 15:00 | 24 | [141] Jerzy Janowicz v Lucas Pouille [16] | 7-6,7-6,3-6,6-1 | |
| Wimbledon | 07/03 10:30 | 23 | [164] Denis Shapovalov v Jerzy Janowicz [141] | 4-6,6-3,3-6,6-7 | |
| ATP Eastbourne Qual | 06/24 16:10 | 26 | [302] Franko Skugor v Jerzy Janowicz [138] | 7-6,7-6 | |
| ATP Stuttgart | 06/16 15:30 | 27 | [49] Benoit Paire v Jerzy Janowicz [155] | 6-1,7-6 | |
| ATP Stuttgart | 06/15 13:10 | 26 | [155] Jerzy Janowicz v Grigor Dimitrov [12] | 7-6,6-3 |