Sir Alex Ferguson’s seemingly impenetrable defensive pairing of, Rio Ferdinand and Nemanja Vidic, have come to reflect the increasing dominance of Manchester United, who have become as solid at the back, as they are devastating in attack.

Irwin believes this stability in defence and goal scoring consistency, has helped to forge United’s success this season.

"Our defensive record has been very good this season and that's down to a few reasons," Irwin told Manchester United’s official club website. "One is the way that some teams have been scared to go at us a little bit because they saw last season how dangerous United can be on the break.

"Another reason is the stability that we've had there. The manager hasn't changed it round too much at the back and that really helps."

"Tevez and Rooney will battle back and work hard for you as well," he said. "They're both little terriers and will work their socks off to get the ball back.

"The defenders really appreciate that – Giggsy's been doing it for years. The players are all well aware of their defensive duties and they'll all track back."