Celtics vs. Hawks 1st-Round Series Preview and Prediction

The Atlanta Hawks, the No. 4 seed in the Eastern Conference, are set to play the No. 5 seed Boston Celtics in the first round of the NBA playoffs.

What's the crucial matchup? Who is the X-factor? Who will ultimately move on to the second round?

Watch Stephen Nelson and Bleacher Report NBA Analyst Ric Bucher break down the Celtics-Hawks series in the video above.