| ITF - M15 Monastir | 12/10 13:15 | 25 | [468] Lakat, Florian v Doumbia, Sadio [351] | 6-3,4-6,5-7 | |
| Shenzhen II, Chine | 10/28 03:45 | 24 | [342] Doumbia, Sadio v Nedelko, Ivan [324] | 3-6,3-6 | |
| Liuzhou, Chine | 10/21 06:00 | 24 | Makoto Ochi v Doumbia, Sadio | Cancelled | |
| Ningbo, China | 10/15 02:00 | 24 | Goncalo Oliveira v Doumbia, Sadio | Cancelled | |
| Nur-Sultan II, Kazakhstan | 09/30 12:25 | 24 | Khumoyun Sultanov v Doumbia, Sadio | Cancelled | |
| Challenger Sibiu | 09/17 09:00 | 24 | [330] Doumbia, Sadio v Zdenek Kolar [271] | 4-6,2-6 | |
| Challenger Banja Luka | 09/10 08:00 | 24 | [482] Genaro Alberto Olivieri v Doumbia, Sadio [316] | 1-6,7-5,6-4 | |
| Trieste, Singles M-ITF-ITA-20A | 09/05 15:00 | 27 | [292] Doumbia, Sadio v Varillas, Juan Pablo [399] | 0-6,2-6 | |
| Trieste, Singles M-ITF-ITA-20A | 09/04 12:20 | 26 | Doumbia, Sadio v Giovanni Fonio | Walkover | |
| Trieste, Singles M-ITF-ITA-20A | 09/03 08:50 | 25 | Doumbia, Sadio v Urbanija, Mike | 6-3,3-6,6-3 | |
| Challenger Como | 08/29 11:30 | 26 | [308] Jelle Sels v Doumbia, Sadio [292] | 6-1,7-6 | |
| Challenger Como | 08/28 08:00 | 25 | [292] Doumbia, Sadio v Baldi, Filippo [146] | 3-6,7-6,6-2 | |
| Challenger Como | 08/27 10:00 | 24 | [292] Doumbia, Sadio v Arnaboldi, Andrea [295] | 6-4,6-4 | |
| Cordenons, Italy | 08/13 08:00 | 24 | [312] Andrea Pellegrino v Doumbia, Sadio [294] | 6-2,6-4 | |
| Challenger Manerbio | 08/09 15:00 | 27 | [126] Lorenzi, Paolo v Doumbia, Sadio [307] | 1-6,7-5,6-4 | |
| Challenger Manerbio | 08/09 09:40 | 26 | [328] Andrea Pellegrino v Doumbia, Sadio [307] | 7-5,3-6,4-6 | |
| Challenger Manerbio | 08/06 09:45 | 25 | [307] Doumbia, Sadio v Galovic, Viktor [222] | 6-1,6-2 | |
| Challenger Manerbio | 08/05 08:00 | 24 | [307] Doumbia, Sadio v Pavic, Ante [132] | Retired | |
| Challenger Liberec | 07/29 13:00 | 24 | [332] Manuel Guinard v Doumbia, Sadio [368] | 7-6,6-2 | |
| Challenger Tampere | 07/25 12:50 | 26 | [375] Doumbia, Sadio v Federico Coria [172] | 2-6,3-6 | |
| Challenger Tampere | 07/24 07:30 | 25 | [239] Zdenek Kolar v Doumbia, Sadio [375] | 1-6,6-4,4-6 | |
| Challenger Tampere | 07/23 07:00 | 24 | [416] Patael, Ben v Doumbia, Sadio [375] | Retired | |
| ITF M25 Kassel | 07/20 11:00 | 28 | Doumbia, Sadio v Okala, Jules | 2-6,1-6 | |
| ITF M25 Kassel | 07/19 12:00 | 27 | Doumbia, Sadio v Guenther, Valentin | 7-5,6-2 | |
| ITF M25 Kassel | 07/18 12:25 | 26 | Doumbia, Sadio v Evan Furness | 7-6,7-6 | |
| ITF M25 Kassel | 07/17 16:10 | 25 | Doumbia, Sadio v Pena Lopez, Manuel | 3-6,6-3,6-2 | |
| ITF M25 Casinalbo | 07/12 12:30 | 27 | Doumbia, Sadio v Mircea-Alexandru Jecan | Retired | |
| ITF M25 Casinalbo | 07/11 09:00 | 26 | Doumbia, Sadio v Maxime Chazal | 7-5,6-3 | |
| ITF M25 Casinalbo | 07/09 09:00 | 25 | Doumbia, Sadio v Frinzi, Mattia | 6-4,6-1 | |
| ITF M25 Bourg-en-Bresse | 07/06 13:00 | 28 | Doumbia, Sadio v Kyrian Jacquet | 2-6,1-6 |