Kyrie Irving wasn't the only Boston Celtics player struggling during last night's loss to the Miami Heat. During a second quarter timeout, frustration eventually boiled over between fellow teammates Jaylen Brown and Marcus Morris. 

The two can be seen in a fan video originally posted to Instagram exchanging some words in the huddle before Morris gets in Brown's face and gives him a shove. Teammate Marcus Smart stepped in between the two before the situation escalated any further.

According to Celtics reporter Chris Forsberg, Morris could have been getting in Brown's face about his lack of hustle getting back on defense a few plays prior.

It is unclear what exactly caused the dispute, or what Brown might have said to ultimately set Morris off, but it likely had something to do with Brown's lackluster performance in the Celtics loss though. The 22-year old was only scored two points, and added two rebounds and one assist over the course of the game. Meanwhile, Morris continued his impressive play with 17 points and three three-pointers. 

This Celtics squad is currently on a bit of a hot streak after winning seven of their last 10 games. They are still only sitting at fifth place in the Eastern Conference with a 25-16 record, slightly lower than expected considering many projected them as favorites to win the East heading into this season. 

It will be interesting to see if this little altercation has any impact on team chemistry going forward.