| ATP Cagliari | 04/05 09:00 | 19 | [136] Sumit Nagal v Maxime Janvier [219] | 6-2,6-1 | |
| ATP Cagliari | 04/04 08:00 | 14 | [139] Sumit Nagal v Andrea Pellegrino [283] | 6-3,6-4 | |
| Challenger de Zadar | 03/26 09:00 | 27 | [381] Nerman Fatic v Sumit Nagal [139] | 5-7,6-3,7-5 | |
| Challenger de Zadar | 03/24 09:00 | 26 | Frane Nincevic v Sumit Nagal | 0-6,1-6 | |
| Challenger de Zadar | 03/23 11:30 | 25 | [305] Nino Serdarusic v Sumit Nagal [139] | 6-7,4-6 | |
| ATP Buenos Aires | 03/05 16:00 | 27 | [46] Albert Ramos-Vinolas v Sumit Nagal [150] | 4-6,6-2,7-5 | |
| ATP Buenos Aires | 03/03 23:20 | 26 | [150] Sumit Nagal v Cristian Garin [22] | 6-4,6-3 | |
| ATP Buenos Aires | 03/02 16:10 | 25 | [100] Joao Sousa v Sumit Nagal [150] | 2-6,0-6 | |
| ATP Buenos Aires | 03/01 16:00 | 19 | Sumit Nagal v Nicolas Kicker | 2-6,6-2,6-3 | |
| ATP Buenos Aires | 02/28 21:00 | 15 | [148] Sumit Nagal v Mario Vilella Martinez [193] | 6-4,6-2 | |
| ATP Buenos Aires | 02/27 13:00 | 14 | [359] Carlos Gomez-Herrera v Sumit Nagal [148] | 6-7,6-2,6-7 | |
| ATP Buenos Aires | 02/27 13:00 | 14 | [116] Daniel Elahi Galan v Sumit Nagal [148] | Cancelled | |
| ATP Cordoba | 02/20 13:00 | 14 | [144] Sumit Nagal v Facundo D Acosta [400] | 4-6,6-2,3-6 | |
| Open de Australia | 02/09 03:30 | 23 | [73] Ricardas Berankis v Sumit Nagal [144] | 6-2,7-5,6-3 | |
| ATP Murray River Open | 02/01 07:20 | 24 | [139] Sumit Nagal v Ricardas Berankis [72] | 2-6,2-6 | |
| Challenger de Hamburgo | 10/26 16:00 | 25 | [162] Hugo Gaston v Sumit Nagal [131] | Retired | |
| ATP Colonia 2 | 10/19 14:00 | 25 | [129] Sumit Nagal v Miomir Kecmanovic [41] | 6-4,6-7,1-6 | |
| ATP Colonia 2 | 10/18 09:00 | 164 | [81] Pierre-Hugues Herbert v Sumit Nagal [129] | 6-2,6-2 | |
| ATP Colonia 2 | 10/17 12:00 | 64 | [129] Sumit Nagal v Norbert Gombos [104] | 7-5,6-4 | |
| ATP Cerdeña | 10/13 12:40 | 25 | [74] Laslo Djere v Sumit Nagal [129] | 6-3,6-1 | |
| ATP Cerdeña | 10/11 10:00 | 164 | [102] Andrej Martin v Sumit Nagal [127] | 4-6,2-6 | |
| ATP Cerdeña | 10/10 13:45 | 64 | [273] Geoffrey Blancaneaux v Sumit Nagal [127] | 3-6,3-6 | |
| Challenger de Parma | 10/07 08:00 | 26 | [127] Sumit Nagal v Laslo Djere [73] | 5-7,6-4,4-6 | |
| Challenger de Parma | 10/05 09:00 | 25 | [316] Giulio Zeppieri v Sumit Nagal [127] | 4-6,4-6 | |
| Challenger de Biella | 09/28 10:00 | 25 | [127] Sumit Nagal v Blaz Kavcic [298] | 6-7,4-6 | |
| Open de Francia | 09/21 09:40 | 14 | [127] Sumit Nagal v Dustin Brown [244] | 6-7,5-7 | |
| US Open | 09/03 17:40 | 24 | [124] Sumit Nagal v Dominic Thiem [3] | 3-6,3-6,2-6 | |
| US Open | 09/01 15:00 | 23 | [124] Sumit Nagal v Bradley Klahn [129] | 6-1,6-3,3-6,6-1 | |
| Challenger de Praga | 08/20 13:50 | 27 | Stan Wawrinka v Sumit Nagal | 2-6,6-0,6-1 | |
| Challenger de Praga | 08/19 11:05 | 26 | Jiri Lehecka v Sumit Nagal | 7-5,6-7,3-6 |
Sumit Nagal (Jhajjar, 16 de agosto de 1997) es un tenista indio.
Ganó el título junior de dobles masculino de Wimbledon 2015, convirtiéndose así en el sexto jugador indio en ganar un título de Grand Slam junior. Es el segundo tenista individual indio mejor clasificado y, desde 2018, ha sido miembro habitual del equipo nacional de la Copa Davis de su país.
Ha obtenido dos títulos Challenger y 9 de ITF.