A combination of a neutral site, no fans and more than a 4-month layoff helped produce two Unders during the NBA's two Thursday's opening games of the resumed season. The Jazz-Pelican matchup went under by 19 points and the Clippers-Lakers game fell 16 points below the total.
This matchup has the makings of an Under, too. 
Both the Bucks and Celtics have a lot of star power. So it's easy to think offense with these teams. The Bucks do average the most points per game in the NBA. However, these are two excellent, well-coached defensive teams also. Boston is the third-ranked defensive team in the NBA giving up 106.8 points per game, while Milwaukee ranks fifth allowing 107.4 points a game. 
Each team is using this eight-game reboot to prepare for the playoffs. Their priority is to fine-tune for the postseason and avoid injuries. The Celtics are only going to play Kemba Walker 14 to 20 minutes a game. Walker has been bothered by a sore knee. Giannis Antetokounmpo and Khris Middleton, the Bucks' two best players, aren't likely to play huge minutes either. 
The Bucks were somewhat embarrassed following a 124-103 scrimmage loss to the Pelicans earlier in the week. So their defensive intensity could be raised. Expect vanilla offenses as neither team wants to show much since they could meet again in the Eastern Conference Finals when the stakes are raised.