Club captain Gary Neville has urged Man United fans to trust Sir Alex Ferguson.

Many United fans are questioning the wily Scotsman's decision to sell winger Cristiano Ronaldo for a world record 80 million pound fee to Real Madrid.

"The manager has probably built four or five different teams within the period he's been at United, and it's not been a case of being unsuccessful for three or four years in between while he's been creating a different team," Neville told the Sunday People.

"It's been a brilliant job. Big players have come and gone down the years but the club's success has carried on - and that's down to the way the manager has adapted to situations."

Neville was also quick to suggest that Fergie will find an adequate replacement to fill the shoes of the departing Ronaldo.

"I've heard fans wonder how the club will replace influential players who have been sold but you have to trust the manager - and his record speaks for itself," said Neville.

"The manager's record is absolutely incredible.

"There is no-one comparable, in terms of his continued success, and to have been here over 22 years is a staggering achievement."

The England defender justified his faith in Ferguson by reminding United fans that the boss has never failed them in his years at Old Trafford.

"He keeps a control over the whole club in the way he instils the right qualities into everyone," explained the 34-year-old.

"The other key thing is his decision making. He makes the right decisions and does the right things - that's why he's been able to keep winning trophies."

The full-back also insisted that, despite his career as a Red Devil winding down, he was still hoping to play his part next season.

"I played a good number of games last season and I hope that continues next season, because playing for this club is as special to me now as it was when I first pulled on the shirt as a schoolboy," added Neville.