The Boston center fractured his right ring finger Friday and will miss approximately a month.

The Boston Celtics took down the Dallas Mavericks 120-100 on Friday, in Jayson Tatum’s long-awaited first game of the season. It had been 298 days since Tatum played for the Boston Celtics, due to an Achilles injury.

Nikola Vucevic injury update: The Boston Celtics center suffered a fractured right ring finger, will undergo a procedure, and is expected to miss about one month. The Boston Celtics had a mixed game when they locked horns against the Dallas Mavericks.

Preview the Boston Celtics' NBA matchup with Dallas, including live stream, TV channel, odds, and game information.

The Celtics have lost one of their big men for the foreseeable future. Center Nikola Vucevic fractured his right ring finger early on during Friday’s 120-100 win over the Mavericks, ESPN’s Shams Charania reported.

A mere ten months after tearing his Achilles, Jayson Tatum is expected to make his return to the court for the Boston Celtics (41-21) at TD Garden against the Dallas Mavericks (21-41) tonight. Jaylen Brown and Boston (41-21) have thrived without the All-NBA forward.

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The Celtics will be without Jaylen Brown and Neemias Queta when they face the Milwaukee Bucks on Monday night. Brown is dealing with an illness, while Queta is getting a rest night, per the team’s official injury report.