United have had to play second fiddle to Chelsea for the last two seasons, but when Jose Mourinho's side could only draw 1-1 against Arsenal on Sunday, the title returned to Old Trafford for the first time since 2003.

Ferguson has now spent more than two decades at United, but Beckham insists the 65-year-old Scot is still an inspiration to his players.

"I will never be surprised what Sir Alex Ferguson can do because I know what he is like as a person and as a manager, and whoever writes him off he always proves (them) wrong, and he`s done it again," Beckham said after helping his Real Madrid side beat Sevilla 3-2 in La Liga.

"He knows how good a manager Mourinho is, he knows how good Arsene Wenger and Rafa Benitez are, and he respects them.

"But as a manager you are not going to get many bigger or more successful managers than him."

Beckham, who left United in 2003 to join Real Madrid having won a host of trophies during his time with the Red Devils, was delighted to see his old team reclaim the title.

However, the former England captain believes United`s league success will not mean they will be any less determined to win the FA Cup final against Chelsea in two weeks time - such is Ferguson's unremitting demands for success.

"The good thing about the manager at United, that's what he does. He makes you move on, as soon as you've won a medal he doesn't stop there he makes you want more," Beckham said.

"That is what he put into me, that's what he puts into the rest of the young players."

The 32-year-old midfielder added: "It was a great day, Chelsea draw the game and United win the title for the first time in four years I think.

"As a United fan I`m really happy for the manager and for the players.

"I`m sure they'll be having a great night, the lads, and then move on to the FA Cup final."