Carlos Tevez and Louis Saha, the latter with a late penalty, to move United up to second in the Barclays Premier League as Avram Grant tasted defeat in his first match in charge after taking over from Jose Mourinho.

Chelsea had been reduced to 10 men in the first half when Mikel John Obi was sent off for a two-footed lunge on Patrice Evra.

Giggs said: "One-nil is always a dangerous scoreline even if you are playing against 10 men.

"It was really pleasing to see the second goal go in."

Giggs admitted Tevez's opener, in first half stoppage time, settled Untied down.

"We scored at the right time and that settled us down a bit," he added on Sky Sports 1.

"You just hit an area and hope the centre forward will be in there. Carlos made a great run and he was there

"We're getting players back now so the manager has got lots of options. We've got players who can come on and make an impact as well."

Sir Alex Ferguson admitted he was impressed with his side, who he feels won the game in the opening 45 minutes.

"I think in the context of the game today the first half hour we played as well as we have all season.

"There was terrific penetration, good passing and at that stage we could have been two or three ahead, Petr Cech made a great save from just about the first kick of the game."

Grant was less happy with the performance of referee Mike Dean.

Dean sent off Mikel John Obi in the first half and awarded a contentious late penalty and Grant also believed he played too much stoppage time in the first half, allowing Tevez to score.

"I didn't want to speak about this," Grant continued. "I need to think about it, too many strange things happened today - the sending off, the two minutes (were up) when they scored and then the penalty.

"The official affected the result - we played 10 against 11, they scored in that time and then that penalty."

However, Grant insisted he was happy with the performance of his side after a traumatic week.

"I am very happy with the boys. They gave a lot today after what has happened.

"I think we did fine today and it was not an easy day.

"We need to win games and play good so we will try and do our best. We'll do what we need to do to make the team good.

"I am very proud of what the players did this week - how they behaved, how they trained, their spirit."