| ATP - Sófia | 11/09 18:50 | 25 | [41] Marin Čilić v Jonas Forejtek [399] | 3-6,2-6 | |
| ATP - Paris | 11/05 13:30 | 26 | [43] Marin Čilić v Ugo Humbert [34] | 3-6,7-6,3-6 | |
| ATP - Paris | 11/03 16:45 | 25 | Marin Čilić v Corentin Moutet | Walkover | |
| ATP - Paris | 11/02 17:25 | 24 | [21] Felix Auger Aliassime v Marin Čilić [43] | 0-6,6-3,3-6 | |
| ATP - Colónia 2 | 10/20 09:00 | - | Marin Čilić v Alejandro Davidovich Fokina | View | |
| ATP - Colónia 2 | 10/19 17:20 | 25 | [40] Marin Čilić v Steve Johnson [68] | 6-7,4-6 | |
| ATP - Colónia 2 | 10/19 12:00 | 25 | Marin Čilić v Alejandro D-Fokina | Cancelled | |
| ATP - Colónia | 10/15 13:20 | 26 | [71] Alejandro Davidovich Fokina v Marin Čilić [40] | 3-6,7-6,6-2 | |
| ATP - Colónia | 10/13 15:05 | 25 | [90] Marcos Giron v Marin Čilić [40] | 2-6,6-4,3-6 | |
| ATP - Colónia | 10/13 13:20 | 25 | Ricardas Berankis v Marin Čilić | Cancelled | |
| Open de França | 09/28 10:35 | 23 | [40] Marin Čilić v Dominic Thiem [3] | 4-6,3-6,3-6 | |
| ATP - Roma | 09/18 12:00 | 26 | [34] Casper Ruud v Marin Čilić [40] | 6-2,7-6 |