Boston Celtics forward Jayson Tatum tore his right Achilles tendon in Game 4 of the Eastern Conference semifinals against the New York Knicks on Monday at Madison Square Garden. The Celtics, who are down 3-1 to the Knicks, announced on Tuesday that Tatum has already undergone surgery on his Achilles.

Jayson Tatum appears to be in good spirits after undergoing surgery on his ruptured Achilles, giving fans a thumbs up in his first social media post since Monday's devastating injury.