Before Ibaka, still seething, strode out of the arena without answering to reporters for his sins, he confirmed through a Raptors spokesman that it was what Chriss said to him that set him off.
The words seemingly triggered Ibaka, as he stormed toward Chriss and grabbed him by the neck before the two exchanged haymakers.
The Cavaliers ultimately upset the Raptors 126-101.
Kawhi Leonard scored 25 points after sitting out Sunday's victory in Miami, but his return didn't help the Raptors, who have the league's second-best record.
Ibaka joined Toronto in February 2017.
The incident took place right at the end of the 3rd quarter, when the Raptors threw the ball up court, for Ibaka to collect and shoot, with a second left on the clock.
DeSean Jackson traded to Eagles
NFL Network's Mike Garafolo confirms that the Bucs are shopping Jackson and a return to Philly is not out of the question. Jackson was released by the Eagles in 2014 amid reports that he had affiliations with gang members.
Chelsea ready to take top-four fight down to the wire: Sarri
Maurizio Sarri believes the fallout from Kepa Arrizabalaga's substitution fiasco has made Chelsea a stronger team. You have to improve, tactically, mentally and physically, at that age.
Northeast BC unemployment rises to 6% in February
Job creation in Canada once again blew past expectations with 56,000 positions added in February - a lot of them were full-time. Canada's jobless rate was unchanged at 5.8 percent, even with the employment gains, because more people were looking for work.
Rookie guard Collin Sexton led the way for Cleveland with a game-high 28 points while Kevin Love added a monster 16-point, 18-rebound double-double.
Because of his previous suspensions, TSN Raptors reporter Josh Lewenberg expects Ibaka to receive at least a two-game ban for his role in Monday's fight.
None of the punches landed.
Jordan Clarkson registered double-digits off the bench for the 58th time this season, netting eight of his 14 points in the fourth quarter, going 5-of-11 from the floor overall, including 3-of-7 from beyond the arc.
Cleveland held a 91-77 lead when the fight occurred and poured it on in the fourth quarter. Cleveland converted these takeaways into 17 points, taking advantage of Toronto's miscues.
Sexton led the Cavaliers with 13 first-half points while Leonard had 13 to pace the Raptors. Toronto cut the lead to five, but Love later hit back-to-back 3-pointers to give Cleveland a 78-66 lead. The Raptors made just 11 of 39.