Heskey called time on his England career after the World Cup 2010 in South Africa.
Reports have claimed that England boss Fabio Capello has tried to persuade the veteran striker to come out of retirment for the Three Lions’ Euro 2012 qualifier against Montenegro.
Petrov told The Sun: “I think England will regret the day Emile retired.
“He has been a top Premier League striker for years.
“And every time he played for England he helped those around him – Wayne Rooney, Michael Owen, everyone.
“Yet people have never given him enough credit. He’s very underrated.
“I know how hard he works and how important he is for our team.
“I also know how important he is for England.
“But sometimes you only appreciate someone when they are gone – and I think that will be the case with Emile.”
