Manchester United manager Sir Alex Ferguson has put his continued success at the club down to commitment and sacrifice

Sir Alex Ferguson celebrates clinching yet another Premier League title with Manchester United. Photo: PA

Manchester United manager Sir Alex Ferguson has admitted the only way to satisfy the massive expectations at Old Trafford is to keep winning games.

By beating Aston Villa on Monday, the Red Devils secured the 13th championship of Ferguson's incredible 26-year tenure, and their 20th overall.

Yet despite his enduring success, it is almost taken for granted that by the time next season starts, the Scot will have United hungry for more silverware.

It is a tribute to Ferguson's insatiable desire for success, although that, he insists, only resonates with the demands expected of him.

"If you are going to manage this club, you have to accept there is a sacrifice you have to make," Ferguson said.

"You need to make a commitment to it.

"There is also an expectation to live up to.

"You really need to win all the time. It is the only way you can fulfil the expectation and avoid the criticism."

Ferguson's record since the Premier League era began is quite amazing.

Since 1992, United have never been outside of the top three, and have either won the trophy or been runners-up on 18 occasions.

In contrast, Arsenal are going for their 13th top three finish, Chelsea their 10th, whilst Liverpool will not be adding to their seven.

The figures are startling, and Ferguson puts it down to continuity.

"The hardest thing is to maintain a level of success that keeps going year after year," he said.

"There might be several factors involved in it.

"I have never looked back, always forward.

"And we have had a continuity of management, not just myself but my staff. That definitely helps.

"Also we have a nucleus of players who have been at the club for a long time. Taking aside Ryan (Giggs) and Paul (Scholes), we have had

Rio (Ferdinand) for over 10 years, Nemanja (Vidic) and Patrice (Evra) for a good number of years.

"That does help because it means you are not making wholesale changes every year."

Nevertheless, some triumphs are achieved with a degree of comfort that hasn't been experienced before.

Three seasons ago, United lost out by a point to Chelsea. Last term, goal difference did for them as Manchester City muscled into top spot.

This time around, it has not even been close as United surged away during the Christmas programme and never looked like getting caught, leaving them to play out their final four fixtures as an extended victory parade.

"I am delighted we are sitting here. I would take that any time," said Ferguson.

"But of course, I am surprised.

"With the competition we have in the Premier League we expect it to be tough. It is tough. The competition is more severe now.

"That is why we are delighted with what we have achieved."