| Challenger Liberec | 07/29 10:30 | 24 | Karim-Mohamed Maamoun v Adam Pavlasek | 6-3,6-3 | |
| Challenger Praha | 07/23 10:30 | 24 | Karim-Mohamed Maamoun v Riccardo Bonadio | 7-6,6-7,0-6 | |
| Challenger Amersfoort | 07/17 09:50 | 25 | Pedro Martinez v Karim-Mohamed Maamoun | 7-6,1-6,6-2 | |
| Challenger Amersfoort | 07/15 11:25 | 24 | Corentin Denolly v Karim-Mohamed Maamoun | 6-7,6-3,1-6 | |
| Challenger Braunschweig | 07/07 10:05 | 24 | Karim-Mohamed Maamoun v Daniel Altmaier | 4-6,6-7 | |
| Challenger Fergana | 06/17 10:20 | 24 | Karim-Mohamed Maamoun v Saida'lo Saidkarimov | Retired | |
| Challenger Prostejov | 06/03 10:05 | 25 | Guillermo Garcia-Lopez v Karim-Mohamed Maamoun | 6-4,6-2 | |
| Challenger Prostejov | 06/02 10:40 | 24 | Karim-Mohamed Maamoun v Adam Pavlasek | 6-4,7-6 | |
| Challenger Samarkand | 05/16 06:00 | 26 | Karim-Mohamed Maamoun v Goncalo Oliveira | 4-6,4-6 | |
| Challenger Samarkand | 05/14 09:30 | 25 | Roman Safiullin v Karim-Mohamed Maamoun | 4-6,6-7 | |
| Challenger Samarkand | 05/13 06:30 | 24 | Harry Bourchier v Karim-Mohamed Maamoun | 2-6,6-7 | |
| Challenger Shymkent | 05/07 10:20 | 25 | Roberto Cid Subervi v Karim-Mohamed Maamoun | 1-6,6-3,6-2 | |
| Challenger Shymkent | 05/06 11:05 | 24 | Karim-Mohamed Maamoun v Sergey Fomin | 6-1,6-7,6-0 | |
| Challenger Bordeaux | 04/29 11:25 | 24 | Karim-Mohamed Maamoun v Pedro Cachin | 0-6,3-6 | |
| ITF M15 Cairo | 04/21 08:00 | 29 | Karim-Mohamed Maamoun v Pol Toledo Bague | 6-4,6-1 | |
| ITF M15 Cairo | 04/20 08:00 | 28 | Karim-Mohamed Maamoun v Vit Kopriva | 7-5,6-1 | |
| ITF M15 Cairo | 04/19 10:20 | 27 | Karim-Mohamed Maamoun v Adam Moundir | 6-4,6-2 | |
| ITF M15 Cairo | 04/18 12:00 | 26 | Karim-Mohamed Maamoun v Filip C Jianu | 6-3,6-0 | |
| ITF M15 Cairo | 04/17 10:40 | 25 | Karim-Mohamed Maamoun v Marco De Rossi | 6-1,6-2 | |
| Challenger Barletta | 04/09 14:45 | 25 | Nikola Milojevic v Karim-Mohamed Maamoun | 5-7,6-1,7-5 | |
| Challenger Barletta | 04/08 11:30 | 24 | Karim-Mohamed Maamoun v Vaclav Safranek | 4-6,7-6,6-3 | |
| Challenger Sophia Antipolis | 04/01 13:35 | 24 | Lorenzo Musetti v Karim-M Maamoun | 3-6,6-1,6-2 | |
| Challenger Zhangjiagang | 03/19 06:00 | 25 | [220] Ze Zhang v Karim-Mohamed Maamoun [484] | 6-0,7-6 | |
| Challenger Zhangjiagang | 03/18 05:00 | 24 | [281] Tsung-Hua Yang v Karim-Mohamed Maamoun [486] | 4-6,2-6 | |
| Challenger Shenzhen | 03/11 03:55 | 24 | [486] Karim-Mohamed Maamoun v Marc Polmans [210] | 5-7,6-4,3-6 | |
| Challenger Zhuhai | 03/04 03:30 | 24 | [489] Karim-Mohamed Maamoun v Jose Hernandez-Fernandez [277] | 3-6,2-6 | |
| ATP Dubai | 02/23 07:00 | 64 | [487] Karim-Mohamed Maamoun v Corentin Moutet [134] | 3-6,6-7 | |
| ITF M15 Sharm El Sheikh | 02/10 08:00 | 29 | Karim-M Maamoun v Laurent Lokoli | 6-3,6-1 | |
| ITF M15 Sharm El Sheikh | 02/09 08:00 | 28 | Michiel de Krom v Karim-M Maamoun | 3-6,3-6 | |
| ITF M15 Sharm El Sheikh | 02/08 08:00 | 27 | [487] Karim-M Maamoun v Patrik Rikl [374] | 6-1,7-6 |
Karim-Mohamed Maamoun (born 9 April 1991 in Cairo) is an Egyptian tennis player. Maamoun has a career high ATP singles ranking of 225 achieved on 2 October 2017. Maamoun has represented Egypt at the Davis Cup where he has a W/L record of 17–9.