Ajay Devgn-starrer 'Son Of Sardaar 2', which was scheduled to release on July 25, has been postponed by a week to August 1. This comes a day after Ahaan Panday and Aneet Padda's romantic musical 'Saiyaara' received a record breaking opening of ₹21.25 crore. 'Saiyaara' has become the biggest opener ever for a film headlined by debutants.