Enes Kanter seems to think that non-basketball reasons are behind his lack of minutes this season, but his head coach is insisting that is not the case.

The Boston Celtics big man Kanter hinted on Twitter this week at frustration with his low playing time. “Keep limiting me on the court, I will expose you off the court,” Kanter wrote in a tweet.

In recent months, Kanter has been a vocal critic of the Chinese government and president Xi Jinping. Kanter has expressed his support for Tibetan and Taiwanese independence and has spoken out about China’s alleged human rights violations against Uyghur Muslims and other ethnic groups. He has also called out both the NBA and Nike for what he sees as a failure to stand up to China. As a result, Celtics games have been banned in the country.