Chopra's brace against Preston were his 20th and 21st goals of the campaign.
'Michael's agent sent me a text 15 minutes after he had scored twice against Preston on Friday night,' Peter Ridsdale told the Echo..
'There is a clause in his original contract saying that if he scores 20 goals this season he has the right to a new contract.
'At the time we felt 20 goals would be a tall order, but he has done exceptionally well.'
The possible new deal could see Chopra committed to City until 2010.
Chopra himself set a target of 20 goals, something he'll now have to review. What chance 30? There still 11 games to go.
'I set myself a target of 20 at the start of the season," said Chopra. "But I'll maybe set a new target of 25 or 30.'