For the first time this postseason, both the Indiana Pacers and Boston Celtics will be facing relatively healthy opponents when they meet in Game 1 of the Eastern Conference Finals on Tuesday. Tipoff from TD Garden in Boston is set for 8 p.m. ET. Boston is at -467 on the money line (risk $467 to win $100).

The Celtics are 9.5-point favorites and the over/under for total points scored is 221.5 in the latest NBA odds from the SportsLine consensus for Pacers vs. Celtics (see up-to-date odds for every game this week on our NBA odds page). Before you make any Pacers vs. Celtics picks, you NEED to see what legendary handicapper Bruce Marshall has to say.

An in-demand guest on numerous sports talk radio and TV shows across the country, Marshall, who was synonymous with The Gold Sheet, the famed sports betting newsletter, has been featured in the Las Vegas Review-Journal, the New York Post and many other outlets. He has won various handicapping titles and also is working on several book projects. Marshall has crushed his NBA picks this season for SportsLine members, entering the this matchup on a 190-141 run that has returned more than $3,500 for $100 players. Anyone following has seen HUGE returns!

Marshall knows Boston is led by small forward Jayson Tatum, who recorded seven double-doubles and one triple-double in 10 postseason games. He is averaging 24.3 points, 10.4 rebounds, 5.8 assists and one steal in 39.2 minutes. In the close-out Game 5 win over Cleveland, he nearly registered a triple-double with 25 points, 10 rebounds, nine assists and four steals. He was dominant in four regular-season games against the Pacers, averaging 32.5 points, 11 rebounds and 5.8 assists in 35 minutes.

He is also aware Indiana power forward Pascal Siakam continued his dominance in the Eastern semifinals against the Knicks. In the decisive win at Madison Square Garden, he poured in 20 points, while adding four rebounds and four assists. He posted two double-doubles in the first round series victory over the Milwaukee Bucks. In the Game 1 loss at Milwaukee, he scored 36 points and added 13 rebounds in a 109-94 setback. He followed that up with a 37-point, 11-rebound and six-assist effort in a 125-108 win in Game 2.

Marshall is going Over on the total. He's also found a critical x-factor that has him jumping all over one side of the spread! 

Who wins Pacers vs. Celtics, and what critical x-factor has Marshall jumping on one side of the spread? ... Join SportsLine right now to find out which side of the spread you should be all over, all from the expert on a 190-141 run on NBA picks!