Celtics center Aron Baynes inadvertently hit Irving in the face with an elbow during the first quarter against the Hornets. Irving didn't return, and the team announced he was being monitored for possible concussion symptoms.
Without Irving for most of the game, the Celtics still managed to win their 11th straight contest. They outscored the Hornets 49-30 in the second half for the 90-87 victory at home.
Irving is off to a strong start in his first season with the Celtics. The four-time All-Star leads the team with 20.3 points per game and ranks second with 5.2 assists per game.
The Celtics own the NBA's best record at 11-2 and will look to run their winning streak to 12 games when they host the 7-4 Raptors at 3:30 p.m. ET on Sunday.