TD GARDEN
Tipoff: 7:30 p.m.
TV: Sportsnet One.
Radio: TSN1050
Probable starters:Toronto — Kyle Lowry, DeMar DeRozan, DeMarre Carroll, Pascal Siakam, Jonas Valanciunas. Boston — Marcus Smart, Avery Bradley, Jae Crowder, Amir Johnson, Al Horford.
Key matchup:DeMar DeRozan vs. Avery Bradley.
The Celtics guard is one of the toughest and best defenders in the league and will be out to shutdown one of the NBA’s most prolific scorers.
Need to know: Boston’s Isaiah Thomas, the team’s leading scorer averaging 26 points per game, is expected to miss his second game in a row with a strained groin … Boston routed Orlando on Wednesday night, starting its sixth different starting lineup of the season … Horford, the team’s prized free agent acquisition, has appeared in just 12 games and averages 15.