"Munna Micheal" marks the director-actor duo's third collaboration after their hit films "Baaghi" and "Heropanti".
"We would laugh because we knew there could never be something like this. Whatever I tell him, he does it like my younger brother. There is so much of comfort between the two of us, that these things never bothered us," Sabbir told PTI.
Sabbir helmed Tiger's debut film "Heropanti" and the director believes he has evolved as an actor since then.
"During the first film, he was almost like a child. He wasn't even a filmy boy who knew the filmmaking process. I taught him everything. While we were working on 'Baaghi', I would say something and half way during the sentence he would understand what I am trying to say.
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Sabbir says Tiger is definitely "more invested" in his projects now and shows a great sense of confidence.
"He has grown by leaps and bounds in terms of confidence. In 'Heropanti' he was still trying to understand how films are made and had no clue whether it would materialise the way he would imagine.
"Today he understands, if I am doing something, what are the end results going to be. He is only going to get better."