In the neck-and-neck summit clash on Sunday, Nagal and his Vietnamese partner Nam Hoang Ly beat Reily Opelka and Akira Santillan 7-6 4), 6-4 on No.1 Court of the All England Club.
"It's fabulous winning the Wimbledon title. It's one of the oldest and biggest tournaments, so it's great to win the trophy. I never thought I would be able to do anything like this ever," Nagal was quoted as saying by television channel NDTV.
"It doesn't matter if it's singles or doubles, I am just glad that I have won it."
The 17-year-old also said that coming from India and winning the title makes it even more special.
"After coming from such a big country like India, winning the trophy is even more special," the New Delhi lad said.
Asked what was going through his mind in the topsy-turvy encounter, he said: "I was just worrying as to who would eventually succeed in holding the cup. I was thinking - Are we going to kiss it? I am just glad it is over."