Sir Alex Ferguson was philosophical in defeat following Arsenal's smash and grab 2-1 victory at the Emirates Stadium, insisting all champions must overcome disappointment.

The Reds' boss saw his side go down to two late goals from substitute Robin van Persie and Thierry Henry, who headed the winner in the last minute of stoppage time.

"Both of ourselves and Chelsea will drop points. It is the name of the game. But how we cope is important," insisted the United manager. "Only true champions can come out of such disappointments and show their worth and I expect us to do that. We are still six points clear and we mustn't forget that."

The result prevented United from moving further ahead of nearest challengers Chelsea, who lost 2-0 at Liverpool on Saturday. Nevertheless, Sir Alex remained upbeat after the game and says lessons will be learnt from the experience.

"There is big disappointment in the dressing room but when I look at things now I think the result and the experience of losing so late will be good for us," he explained.

"We have some important away games to come at places like Tottenham, Liverpool and Manchester City, and if we get into that winning position again we won't be making mistakes like we made today again - I can tell you that for sure."

The Reds took the lead on 53 minutes through Wayne Rooney, who recorded his first headed goal of his United career. The visitors led for the next half an hour before van Persie pounced for