Tatum's NBA debut in a 102-99 loss to the Cavaliers last Tuesday was overshadowed by a horrific ankle injury to teammate Gordon Hayward. But that night his 14-point, 10-rebound performance made him the first Celtic to secure a double-double in his debut since Larry Bird did it in 1979. Only five other NBA rookies have a double-double so far this season.

On Tuesday night, Tatum poured in a career-high 22 points in a 110-89 win against the Knicks. Only Lakers lightning rod Lonzo Ball (29) has topped that rookie total so far this season. Tatum made 9-of-15 field goals and four-of-six 3-pointers. On top of that he totaled four rebounds, two assists, two blocks and four steals. Brown, whom the Celtics drafted No. 3 overall in 2016, and Tatum, whom the Celtics drafted No. 3 overall in 2017, became the first Celtics duo to score 20-plus points at 21 years or younger.

"Me and Jayson, we've got to make teams guard us," Brown told reporters after he and Tatum scored a combined 45.

And here's the thing.

Stevens wants Tatum to do more.