Getty Jayson Tatum of the Boston Celtics and Cooper Flagg of the Dallas Mavericks shake hands after the Celtics defeat the Mavericks 120-100 at TD Garden on March 06, 2026 in Boston, Massachusetts. The first NBA meeting between former Duke stars Cooper Flagg and Jayson Tatum carried deeper meaning than a typical regular-season matchup. For Flagg, the No. 1 overall pick and rookie star for the Dallas Mavericks , facing Tatum was the realization of a long-standing basketball dream. Tatum, the