"Training in hand-to-hand combat has been a huge learning curve for me, for this film," Sidharth said in a statement.
The "Ek Villain" star says it is a stunt that can't be faked.
"You have to impeccably time your moves and swing with the right force and angle. That's what makes it so raw, yet so powerful and it perfectly resonates with the character of Rishi that I'm playing in the film," he added.
"A Gentleman - Sundar, Susheel, Risky", a Fox Star Studios production, is set to release on Friday.