Berbatov has urged Lukaku to keep things simple as he looks to find the scoring touch again.
“There has been a lot of criticism for Romelu Lukaku since the game but you'll never catch me having a go at a fellow striker," Berbatov told Betfair. “I know how difficult it is.
“I remember when I was on a bad run at United when I hadn't scored for seven or eight games, but then scored five in one game! It happens to everyone.
“I know he's not scored for eight games, but I don't think the criticism of Lukaku is fair. As Jose Mourinho said, he's working very hard for the team, but this might actually be working against the striker.
“He wants to impress so badly that he is doing too much, and not doing the simple things like getting into the box.
“He is probably over complicating things; you don't want to see him popping up at left-back as he did on Tuesday."
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