The NBA playoffs are less than a month away, and the Milwaukee Bucks could already be in trouble. On Tuesday, the Bucks learned that they will be without their superstar guard Damian Lillard indefinitely after he sustained a blood clot in his right calf.

Victor Wembanyama of the San Antonio Spurs was diagnosed with it in his shoulder after he returned from the All-Star Game last month and was quickly ruled out for the season. He, like Lillard, is on blood-thinning medication, but doctors have assured the Spurs that there is no concern for Wembanyama’s long-term health.