Speaking ahead of Game 5 of the Eastern Conference Semifinals, Joe Mazzulla mapped out the Celtics' mindset after Jayson Tatum's injury.

Boston Celtics forward Jayson Tatum told TNT Sports' Reggie Miller in a text that the torn Achilles he suffered Monday will not define him as he looks forward to returning to the court.

The Celtics played their best game of the series on Wednesday night after receiving a message from a hobbled Jayson Tatum.

In a film session between Games 4 and 5 of their Eastern Conference semifinal series, as the Celtics prepared for their first game against the New York Knicks without Jayson Tatum, veterans Jaylen Brown and Al Horford challenged the remaining members of the team to rally for their injured superstar.

The end of the Boston Celtics' Game 4 loss to the New York Knicks on Monday was devastating. Far worse than going down 3-1 in their second-round series was the fact that Jayson Tatum was lost for the remainder of this run (and likely next season) after rupturing his Achilles tendon.

Jayson Tatum was ruled out for the remainder of the NBA Playoffs and beyond after suffering a ruptured Achilles in the final minutes of Game 4. The former Duke standout underwent surgery the very next day (Tuesday) and will start the long recovery process.

The Knicks couldn't finish off the Celtics in Game 5 on Wednesday, with Boston staving off elimination despite being without superstar Jayson Tatum.

NBA World Reacts to Scary Jayson Tatum Non-Contact Injury. It seems that Celtics fans aren't sure if the team is able to step up and win without him. In a recent poll b

The Boston Celtics championship defense is still alive. In the team's first game since losing star forward Jayson Tatum, big nights from Jaylen Brown and Derrick White helped steer the team to a 127-102 victory over the New York Knicks and cut the series deficit to 3-2.

The Celtics, behind 22 3-pointers and a breakout game from big man Luke Kornet, stayed alive in the NBA postseason, beating the Knicks on Wednesday night in Boston, 127-102.

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.