Golden State Warriors All-Star Draymond Green punched teammate Jordan Poole during a practice Wednesday.

Sources said that the two players had been verbally arguing ahead of some shoves, which escalated when Green swung and made contact with Poole. Team officials are reviewing the incident.

Sources said that Poole was uninjured by the punch and finished his practice before leaving the practice range on Wednesday.

Green has a history of challenging past and present teammates in practice and game environments. Green could get some punishment for Wednesday’s practice escalation.

The athlete first reported the incident.