Back to work after completing his jail term, Sanjay Dutt has been sweating it out as part of his prep for Siddharth Anand's next. His character in the action flick requires him to perform commando-style stunts and the actor has been training in martial arts on the ground floor of his Pali Hill home. However, he seems to want to keep those rigorous sessions low-key. He has now covered the boundary of his house with green cloth after a snap of him boxing recently did the rounds.

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