Manchester United legend Gary Neville has called on the club's executive vice-chairman, Ed Woodward, to deliver "profit on and off the pitch".
Woodward has been criticised heavily for failing to back Jose Mourinho in the transfer market as the pressure builds on the Portuguese following Sunday's loss to Brighton.
And Neville has urged Woodward to start balancing his tremendous work in the commercial sector with bringing trophies to Old Trafford.
"Ed Woodward's job is to deliver profits on and off the pitch," he told Monday Night Football. "Profit on the pitch is performance and trophies - league titles and Champions Leagues.
"The club are delivering off the field, Ed Woodward has done an incredible job in terms of the commercial operation and the way in which the club makes an operating profit, but there is no doubt he should put a footballing structure underneath him that his extremely serious and can go and deliver for him on the pitch.
"Football has changed, gone are the days of a chairman and manager. Now there are heads of recruitment, sporting directors and a series of people that are operating at the best football clubs in the world, like Bayern Munich and, unfortunately Manchester City, whose operating structure and people are fantastic.
"Manchester United now have to do the same. Ed Woodward can then sit there as executive vice-chairman and make sure the commercial side and the footballing side deliver profit on and off the pitch.
"United need serious football people to be able to guide the club because they've been bouncing from strategy to strategy.
"The traditions at the club went out of the window when they sacked David Moyes halfway through a season, Louis van Gaal after an FA Cup win and appointed Jose Mourinho.
"You're now in a mode of modern football, so the club needs to adapt a modern structure. The old style of principle at Manchester United, where they were patient and gave managers an opportunity over three or four seasons, is over.
"The way the club are trying to operate now is by spending serious money, £200m a season. You need serious people you can trust to spend that money for you."
