Per reports from The Atheltic’s Shams Charania and The Boston Globe’s Adam Himmelsbach, Boston Celtics guard Marcus Smart suffered a Grade 1 calf strain:
Positive news for the Celtics: First-team All-Defensive guard Marcus Smart has been diagnosed with a Grade 1 left calf strain, sources tell @TheAthletic @Stadium. He will miss some time, but sigh of relief for all.
— Shams Charania (@ShamsCharania) January 31, 2021
Can confirm that Marcus Smart has been diagnosed with a Grade 1 calf strain, as @ShamsCharania said.