The Frenchman became the world’s most expensive player when United paid £90m to re-sign him from Juventus, but he has been unable to lift them into the top four and he has contributed just four goals and three assists in 25 Premier League games so far.
Lampard, who scored 177 Premier league goals from midfield over the course of a glittering playing career at West Ham, Chelsea and Manchester City, insists there’s plenty of room for improvement.
“It was a signal of their intentions to spend £90m on player who I wouldn’t say is the finished article,” he said on Monday Night Football. “He’s got fantastic attributes. He’s strong, he’s got great feet, he’s bigger than you and he’s quicker than you as a midfield player.
“But when you have a £90m price-tag on your shoulders, we analyse more and we want more. I’m still wondering, what’s his best position? What kind of player is he? What does he want to be?