Sanjay, who is currently lodged in the Yerawada Central Jail in Pune, plays the lead role of a cop in "Policegiri", the Hindi remake of Tamil blockbuster "Saamy".
"Even after Sanjay was sentenced to jail term, there was hardly any effect on his commitment towards the film. He didn't let his personal problems affect the output of the film and ensured to work collaboratively," Ravikumar told IANS.
"We miss him in post-production. I still recall how friendly he was on the sets with the entire team. This certainly helped me to connect to him as a friend, and not just as director," he added.
Ravikumar, who is known for making hit Tamil films such as "Muthu" and "Panchathantiram", says Sanjay shot with conviction after he was sentenced to imprisonment in the 1993 Mumbai bomb blast case.
"We had finished most of the film before Sanjay was sentenced to prison, except for a few songs and some scenes. However, it amazed me how strongly he returned post-judgment and shot for the rest of the scenes. Typically, anyone will be sulking in such a situation, but not Sanjay," he said.
Queried if he plans to make more Hindi films, Ravikumar said: "I haven't given it a thought because I want this film to come out first and only then can I decide my next course of action".
The film, which is scheduled to release July 5, is produced by T.P Aggarwal and Rahul Aggarwal.