Chicago Bulls’ Nikola Mirotic is reportedly out of action for the foreseeable future after an altercation with team-mate Bobby Portis.

Mirotic, who won the 2015 Eurobasket crown with Spain was taken to the hospital on Tuesday after a shoving altercation with Portis during practice ended with an alleged cheap shot from Portis to Mirotic’s face. The forward is undergoing tests.

It is unclear how the altercation started and what happened to cause Portis to allegedly punch Mirotic.