| Challenger Praga | 08/17 10:00 | 25 | [167] Jay Clarke v Sumit Nagal [127] | Retired | |
| Puchar Davisa | 03/07 17:00 | 45 | [37] Marin Čilić v Sumit Nagal [127] | 6-0,6-1 | |
| Challenger Pau | 02/25 14:50 | 25 | [127] Sumit Nagal v Hugo Grenier [250] | 1-6,6-2,3-6 | |
| Challenger Bengaluru | 02/13 09:30 | 26 | [126] Sumit Nagal v Blaz Rola [149] | 3-6,3-6 | |
| Challenger Bengaluru | 02/11 11:35 | 25 | [126] Sumit Nagal v Malek Jaziri [260] | 6-0,6-4 | |
| ATP Pune | 02/03 12:55 | 25 | [125] Sumit Nagal v Viktor Troicki [191] | 2-6,7-6,1-6 | |
| Australian Open | 01/16 02:50 | 44 | [172] Mohamed Safwat v Sumit Nagal [130] | 7-6,6-2 | |
| Puchar Davisa | 11/30 07:10 | 4 | Yousaf Khalil v Sumit Nagal | 1-6,0-6 | |
| Puchar Davisa | 11/30 07:10 | - | Muhammad Shoaib v Sumit Nagal | Cancelled | |
| Puchar Davisa | 11/29 09:00 | - | Huzaifa Abdul Rehman v Sumit Nagal | 0-6,2-6 | |
| Challenger Pune | 11/15 07:30 | 27 | [190] Ramkumar Ramanathan v Sumit Nagal [127] | 6-4,7-6 | |
| Challenger Pune | 11/14 08:00 | 26 | [323] Ivan Nedelko v Sumit Nagal [127] | Retired | |
| Challenger Pune | 11/13 09:15 | 25 | Aryan Goveas v Sumit Nagal | 3-6,6-7 | |
| Challenger Lima | 10/22 20:40 | 25 | [306] Orlando Luz v Sumit Nagal [129] | 6-1,6-4 | |
| Challenger Santo Domingo | 10/08 17:00 | 25 | [224] Alejandro Tabilo v Sumit Nagal [129] | Retired | |
| Challenger Campinas | 10/05 16:25 | 28 | [135] Sumit Nagal v Juan Pablo Ficovich [325] | 4-6,1-6 | |
| Challenger Campinas | 10/04 15:00 | 27 | [262] Francisco Cerundolo v Sumit Nagal [135] | 6-7,5-7 | |
| Challenger Campinas | 10/03 16:15 | 26 | [327] Orlando Luz v Sumit Nagal [135] | 5-7,3-6 | |
| Challenger Campinas | 10/02 13:00 | 25 | [363] Gastao Elias v Sumit Nagal [135] | Retired | |
| Challenger Buenos Aires | 09/29 16:00 | 29 | [166] Facundo Bagnis v Sumit Nagal [161] | 4-6,2-6 | |
| Challenger Buenos Aires | 09/28 14:00 | 28 | [108] Thiago Monteiro v Sumit Nagal [161] | 0-6,1-6 | |
| Challenger Buenos Aires | 09/27 17:55 | 27 | [161] Sumit Nagal v Francisco Cerundolo [266] | 6-3,4-6,6-4 | |
| Challenger Buenos Aires | 09/26 15:00 | 26 | [161] Sumit Nagal v Jose Hernandez-Fernandez [265] | 6-3,3-6,6-4 | |
| Challenger Buenos Aires | 09/24 15:30 | 25 | [161] Sumit Nagal v Pedro Sakamoto [366] | 6-7,6-4,6-3 | |
| Challenger Banja Luka | 09/15 10:00 | 29 | [187] Tallon Griekspoor v Sumit Nagal [174] | 6-2,6-3 | |
| Challenger Banja Luka | 09/14 09:00 | 28 | [174] Sumit Nagal v Filip Horansky [189] | 7-6,6-2 | |
| Challenger Banja Luka | 09/13 12:15 | 27 | [174] Sumit Nagal v Federico Coria [155] | 6-2,7-5 | |
| Challenger Banja Luka | 09/12 08:30 | 26 | Sumit Nagal v Matija Pecotic | 6-1,6-1 | |
| Challenger Banja Luka | 09/11 08:00 | 25 | [174] Sumit Nagal v Ivan Nedelko [343] | 6-3,7-6 | |
| Challenger Genova | 09/02 09:20 | 24 | [190] Sumit Nagal v Giulio Zeppieri [470] | 1-6,5-7 |
Sumit Nagal (ur. 16 sierpnia 1997 w Jhajjar) – indyjski tenisista, zwycięzca juniorskiego Wimbledonu 2015 w grze podwójnej, reprezentant kraju w Pucharze Davisa.