The 7-footer, who's been out since Dec. 17 with a fractured right pinkie finger, was upgraded to "questionable" on Sunday's injury report.
Fellow big man Daniel Theis is also listed as questionable with right knee soreness, while Robert Williams remains out with a left hip bone edema.
C's rookie Romeo Langford (illness) was removed from the injury report after missing the last five games.
#NEBHInjuryReport for tomorrow vs. Chicago:
Vincent Poirier (right pinkie fracture) - QUESTIONABLE
Daniel Theis (right knee soreness) - QUESTIONABLE
Robert Williams (left hip bone edema) - OUT
— Boston Celtics (@celtics) January 12, 2020
The Celtics are coming off a 140-105 bounce-back win over the New Orleans Pelicans that halted their season-long three-game losing skid. They'll look to carry that momentum into Monday night vs. a Bulls team they beat 111-104 on Jan. 4.
Don't miss NBC Sports Boston's coverage of Bulls-Celtics, which tips off Monday at 7 p.m. with Celtics Pregame Live, and then Mike and Tommy have the call at 7:30 p.m. You can also stream the game on the MyTeams App.