One day after dropping words like “bored,” the Celtics  added another word to their lexicon: angry.
Right from the opening tip on Monday, the Celtics seemed determined to not just beat the Hawks, but crush them and in the process atone for their last two games. It was basically over after the Celtics opened up a 16-3 lead, but it would get much worse for the Hawks.
After 12 minutes the Celtics led 39-13 in what will be a candidate for the most perfectly-played quarter of the season. The Celtics 72 percent (18-for-25) and outrebounded the Hawks, 16-3.
Nate Robinson  had more assists in the first quarter (five) than the Hawks had baskets (four). The Celtics didn’t let up, another problem area the last few games, and cruised to a 99-76 victory.
WHAT WENT RIGHT
Rebounding: After a strong start to this season on the glass, the Celtics have tailed off a bit in the rebounding department. The Thunder feasted on the offensive glass and the Raptors came up with the kind of long, loose-ball rebounds that drive coaches crazy. The Celtics tightened all that up against the Hawks, outrebouding them 16-3 in the first quarter and 26-10 (with one offensive rebound) in the first half.
Physical mismatches: Al Horford is a good player, an All-Star last season and maybe again this season, but he has no chance guarding Shaquille O’Neal . Shaq used his size and also showed some good quickness in dominating this matchup. At the other end of the floor, Robinson ran circles around Mike Bibby , who is basically a stationary jump shooter these days. The one matchup where the Hawks should have been competitive: Kevin Garnett  destroyed the younger Josh Smith, holding him without a field goal and just three rebounds.
Robinson continues to impress: Rajon Rondo  missed his second straight game with a strained left hamstring, and for the second straight day, Robinson filled in admirably. He recorded his first double-double as a member of the Celtics with 16 points and 10 assists. Regardless of how long Rondo is out, this has been a great opportunity for Robinson to get his game back on track.
Since not much can go wrong in a 23-point win, here’s one more bonus thing that went right for the Celtics
No let-ups: Not that it was much in doubt, but the Hawks did “win” the second quarter, 29-25. The Celtics left no doubt in the third quarter, holding Atlanta to 4-for-21 shooting and beating them with defense. This was the kind of thorough, 48-minute performance that Doc Rivers  has been waiting for.