TD Garden hosts Game 3 between the Boston Celtics and the Miami Heat at 8:30 p.m. ET on Saturday. Boston is favored by six points at Caesars Sportsbook, while the Over-Under is set at 208 (see up-to-date odds for every game this week on our NBA odds page). 

Before making any Heat vs. Celtics picks, you NEED to check out the NBA predictions from SportsLine expert Zack Cimini.

A Las Vegas handicapper who's never afraid to buck conventional wisdom, Cimini excels in multiple sports. Over the past 32 NBA selections, Cimini is 21-11, returning $890 to $100 players. He is also on an amazing 32-16-1 run with his last 49 against-the-spread picks involving the Celtics, returning $1,448 to $100 players.

Cimini knows the Celtics are elite on defense, and Boston led the NBA in defensive rating this season. Boston is also playing quite well on offense, including a 121.2 offensive rating in the first two games of the series. The Celtics have a 62.5 percent true shooting mark against Miami in the postseason, and Boston is scoring nearly 1.14 points per possession in the playoffs overall. That includes a 65.1 percent assist percentage, 25.1 assists per game, and 37.7 percent shooting from three-point range.

He also knows the Heat are also operating at an impressive offensive level in the playoffs. Miami is scoring more than 1.15 points per possession the series and 1.145 points per possession in the playoffs. The Heat are dominating the offensive glass in snatching 31.6 percent of missed shots, and Miami is shooting 46.4 percent from the field. Jimmy Butler keys the attack with 29.8 points per game in the playoffs, including 35.0 points per contest in the series.

Now, Cimini has set his sights on Heat vs. Celtics. We can tell you he is leaning under the total, and he's isolated a critical x-factor that makes one side hit HARD! You ABSOLUTELY need to see what he has to say before locking in any NBA picks.

Who wins Heat vs. Celtics? And what critical x-factor makes one side hit hard? ... Join SportsLine right now to find out which side of the Heat vs. Celtics spread you should be all over Saturday, all from the expert on a roll on NBA picks!