CHICAGO — After the Celtics’ shootaround Monday morning at Moody Bible Institute, Leandro Barbosa stayed around for a few minutes, taking jumper after jumper, most of which touched nothing but net.

Barbosa began his Celtics tenure with a sizzling 6-of-8 shooting performance en route to 16 points in the season-opening loss to the Heat. But going into Monday’s 101-95 victory over the Bulls, Barbosa was 4 of 16 from the field since the opener, including 0 of 6 in Saturday’s win against the Bucks. Against the Bulls he shot 3 of 7 for 6 points in 15 minutes.