straight to your inbox every day for freeRio Ferdinand has insisted Manchester United must sign Erling Haaland whatever the price and he believes Ole Gunnar Solskjaer's relationship with the striker could give the club an advantage.MEN Sport understands that the United manager and football director John Murtough mutually agree that Haaland is the ideal long-term replacement for Romelu Lukaku, having tried to sign Haaland from Red Bull Salzburg last season.