OAKLAND (CBS SF) – Warriors Guard Klay Thompson has been diagnosed with a concussion and won’t be able to step on the court again until he passes the NBA’s required tests.

Thompson was kneed in the head in Game Five of the Western Conference Finals against the Houston Rockets Wednesday night.

READ MORE: 3 Teens Accused Of Killing Man, Stealing His Dog & Car In San Francisco On New Year's Eve

He originally appeared to be headed back into the game, but was forced to leave the court again after blood was found streaming from his ear.

READ MORE: Santa Clara County Courts Reopening To Public As COVID-19 Omicron Surge Declines

The NBA says he won’t be allowed to return to action until he is symptom free.

MORE NEWS: San Francisco Police Preparing to Handle Niner Fan Festivities on Sunday

The Warriors don’t begin play against the Cleveland Cavaliers until next Thursday in Oakland.