Pundits expected a struggling start to the season for the North London club after they lost top scorer Robin van Persie to Manchester United but Arsenal have hit really their stride in the last couple of weeks.
After a couple of disappointing goalless draws to open their campaign, Arsenal beat Liverpool 2-0 at Anfield, thrashed Southampton 6-1 at home and on Tuesday enjoyed a perfect start to their 15th consecutive Champions League campaign.
"We have had a decent start to the season and we have kept the run going, and that is important all round, for the whole season," assistant coach Steve Bould told reporters in Montpellier.
"We have got great team spirit and I think that was evident tonight. Everybody is digging in and things are looking OK."
Midfielder Abou Diaby said the manner of their victory after going a goal down to an early penalty was a boost ahead of Sunday's trip to Manchester.
"It is important to start the Champions League with a victory but it is also for everything that comes next," he told reporters. "It gives us more confidence."
"Of course Sunday is a tough test," Bould said. "We go in there with a bit of confidence, with everybody believing things are going okay. But it is a proper test and that is what we want to do.
"Hopefully we can come through the other side and say we have done okay again on Sunday. Everybody is fine, touch wood.
"Things are looking quite bright."
