Filmmaker Ali Abbas Zafar, who is gearing up for the release of Salman Khan-starrer Tiger Zinda Hai, says actress Katrina Kaif really pushed herself for her role in the film.

"She has also gone the extra mile to train in important nuances like aggressive hand-to-hand combat. The action that Katrina has done looks very real onscreen," Zafar said in a statement.

The actress is playing Zoya, a spy, and had to train under real intelligence agents for her role. 

"It was essential to understand how such agents think and operate. So, we got Katrina to train with real agents," Zafar added. 

Tiger Zinda Hai is a sequel to Ek Tha Tiger and is slated for release on December 22.