My heart says Celtics in 7. (If I had to bet my house on this series...Atlanta in 5 or 6.)
Playing the Hawks is better than playing Cleveland for sure. The Hawks aren't a big physical team, but a smart, efficient, well coached team. If we can keep Milsap to his season average's, we have a shot.
But keeping bigs under control is not something the C's do well.
Lastly...If you noticed, the comeback against the Heat took place with IT on the bench. Ball movement improved, over-all defense also improved, so did pace. (sometimes certain PG's want the ball in their hands too much of the time.) Stevens must realize that the Celtics 2nd team is as good, or better than the starters.