Bucks star Damian Lillard will miss the start of the NBA playoffs because of a blood clot in his right calf, sources told ESPN.

The Milwaukee Bucks said Damian Lillard has made “significant improvement” in his recovery from deep vein thrombosis in his right calf, but they haven’t indicated when the seven-time all-NBA guard might start playing again.

Milwaukee Bucks guard Damian Lillard remains out for the NBA playoffs, but is on the mend, the team announced Tuesday. Per the team, Lillard’s deep vein thrombosis in his right calf has improved and he will continue to increase his on-court basketball activity.