The Bulgarian played with the Frenchman at Monaco between 2014-15, and received a call from United's chief scout Jim Lawlor before the Reds made an approach.
“The funny thing is, before Manchester [United] bought him, Jim Lawlor gave me a call – the head scout from Manchester,”
reported Berbatov in today's MUTV Group Chat, which you can watch in full on ManUtd.com and our Official App from 16:00 BST.
“And he's like, 'Berba, we're watching that boy from Monaco, Martial. What do you think?'
“I was like: 'He's unbelievable, he's just needs some guidance, someone to give him the right direction.