Jose Mourinho says Romelu Lukaku didn't celebrate because he was playing against his old club.

For the second match in a row, the Manchester United forward has not celebrated when he has scored.

United were up against Lukaku's former loan club, West Bromwich Albion, on Sunday. And despite scoring the opening goal of the game, the Belgian stood still.

Mourinho said: "I didn't celebrate too. Nobody was happier than me. Fifteen years ago I look at myself celebrating goals.

"With maturity you go into levels that you control your emotions better. Romelu was a happy kid at West Brom (on loan during the 2012/13 season) – maybe at the back of the mind it was his love for the club."