It all comes down to one game. With a 2018 NBA Finals berth on the line, the Boston Celtics play host the Cleveland Cavaliers in Game 7 on Sunday at 8:30 p.m. ET. Boston opened as a 2.5-point favorite. The Over-Under, or total number of points Vegas thinks will be scored, has ticked down to 199.5 from an opening of 201.5.