Is Cooper Flagg playing tonight against the Boston Celtics? Latest update on the Dallas Mavericks star's injury report (February 3, 2026)

Cooper Flagg is expected to play when the Dallas Mavericks host the Boston Celtics on February 3, 2026, at the American Airlines Center. The rookie forward is not listed on the latest injury report, and there are no indications of a new health concern.

Flagg had missed time in mid-January after spraining his left ankle, but he has already returned to action. With several Dallas players unavailable, the Mavericks are likely to rely heavily on him again in this matchup.

Cooper Flagg's injury report vs the Boston Celtics (February 3, 2026)

The 19-year-old Cooper Flagg has produced strong numbers in recent outings. He scored 49 points against the Charlotte Hornets, the highest total by a teenager in league history. In the next stretch, he recorded 34 points, 12 rebounds, and five assists in a close loss to the Houston Rockets.



For the season, Flagg is averaging 18.2 points, six rebounds, and 4.4 assists. His role in the offense has grown as injuries have forced lineup changes. Betting lines reflect that trend. His scoring prop is set at 20.5 points, with projections placing him slightly above that mark at 21.3 against Boston.

Cooper Flagg's Ankle injury behind him

Flagg suffered the sprain on January 14 against the Denver Nuggets after landing on another player’s foot. He attempted to continue but left the game early. He then sat out the following matchup against Utah before returning without restrictions.

He has missed only two games this season and one was due to illness and the other because of the ankle injury. By late January, he was no longer on the injury report. Head coach Jason Kidd has spoken about Flagg’s ability to handle minor injuries and remain available.

Dallas Mavericks dealing with multiple injuries vs Boston Celtics (February 3, 2026)

Dallas Mavericks enters the game with a 19-30 record and sits 12th in the Western Conference. The team is also on a four-game losing streak. Injuries across the roster have increased Flagg’s workload, with Naji Marshall and Klay Thompson expected to support him.

Boston Celtics enters short-handed as well

The Celtics arrive with a 31-18 record, placing them third in the Eastern Conference. They are coming off a win over Milwaukee and have leaned on Jaylen Brown, who is averaging 26.5 points per game. Jayson Tatum will not play, which puts more pressure on Boston’s rotation.

Also read: Boston Celtics vs Dallas Mavericks injury report: Who's playing, injured and questionable players, head-to-head records, team stats, and more (February 3, 2026)

The game also marks Flagg’s first meeting with the team he supported growing up. The projected total is 222.5, suggesting expectations of steady scoring from both sides. Final lineup decisions are typically confirmed shortly before tip-off.


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