The 27-year-old striker was forced off in the 25th minute of Cardiff's Championship clash with Barnsley on Sunday and replaced by Chris Burke.
Cardiff's ?4m record signing went down clutching his hamstring and needed the help of a stretcher to leave the arena.
Chopra has missed games this season due to a series of ankle injury problems.
Cardiff now hope Chopra, the scorer of 11 goals in all competitions this season, will be able to return for the final stages of their Premier League push this season.
Dave Jones' men have nine league games remaining after Sunday's game with Barnsley - with their final Championship match at Burnley on 7 May.
Source: BBC Sport
Source: BBC Sport