"All my opponents in the film were real boxers," Priyanka said here in an interview.
"It was very difficult to shoot with them because they are real boxers and they don't know how to fake a punch, they had to really hit you. So I had to get hit a lot and that was really hard," she added.
Co-produced by Sanjay Leela Bhansali and Viacom 18 Motion Pictures, "Mary Kom" shows Kom's journey from an athlete to a boxer, opposition faced by her father to take up the sport as a profession, training with men, her fearless nature, marriage and so-called end of her boxing career.
Directed by Omung Kumar, it is slated for a Sep 5 release.