Rooney trained with his new team mates at their Finch Farm centre earlier in the day before addressing the cameras with Koeman when he said returning to the club was a "no-brainer".

Koeman immediately made it clear that he expected Rooney to provide an offensive threat, ending suggestions that he might play in midfield.

"Everyone knows the qualities of Wayne. We're trying to get more productivity. He can be 10 behind the striker, the 9, the 7," said Koeman.

"We need to improve our goal strike rate. Last season Romelu (Lukaku) scored 25 goals and the next best was with four or five. That's not good enough. Wayne is the sort of player who can bring productivity to the team."