Arsene Wenger praised his players for matching Birmingham's physical challenge and keeping their cool as victory kept them in the title hunt.
Goals from Robin van Persie and Samir Nasri plus an own goal from Roger Johnson earned the Gunners a sixth away victory of the season.
It was the perfect start to 2011 for Wenger and keeps his third-placed side within two points of the two Manchester clubs, United and City.
I hope Arsenal wins something this season, Wenger. Otherwise, it might cost your precious job.