New Delhi, Aug. 5 -- Son of Sardaar 2 Box Office Collection Day 4: Ajay Devgn-Mrunal Thakur's comedy movie Son of Sardaar 2 faces stiff challenges at the box office. Amid its struggle to retain momentum, while Mahavatar Narsimha and Saiyaara continue to command strong hold, the movie saw 72.97 percent fall in collection on first Monday.

Vijay Kumar Arora directorial movie failed to monetise the hype and collected Rs.2.5 crore net in India on August 4, film industry tracker Sacnilk reported. During its 4-day run in theatres the most-awaited sequel to 2012 Son of Sardaar collected Rs.27.25 crore net. With dwindling numbers, it registered 11.81% Hindi occupancy on August 4.

It opened to Rs.7.25 crore net on August 1 and witnessed decent ea...