It is the worst-case scenario for Boston, and what was feared from the moment Jayson Tatum collapsed to the floor, grabbing his ankle late in the Game 4 loss to the Knicks. Tatum has a ruptured Achilles tendon and underwent surgery to repair it on Tuesday,

Boston Celtics superstar Jayson Tatum sent a heartfelt message to NBA fans after undergoing successful surgery on his ruptured Achilles tendon.

How does this impact Boston's postseason hopes? More importantly, what does it do to the team's contention window in the short and medium term?