Tatum and Bird both score 15, D-Jax owns the fourth and Zizic gets first double-double (videos)

Jayson Tatum scored 15 points to go with six rebounds and two dimes as the Celtics once again beat the Sixers and improved to 3-0 in Las Vegas Summer League. Tatum was Celtics' best scorer along with Jabari Bird and his role should increase even more with Jaylen Brown being likely shut down for the rest of summer.

Jabari Bird played his best game in this year's Summer League edition, finishing the game with 15 points on 7/10 shooting to go with eight boards, including a massive put-back slam. Bird is working hard on both end of the floor as the secound round draft pick is fighting for the roster spot on this Celtics team.

Speaking of fighting for the roster spots, Demetrius Jackson who is playing on un-guaranteed deal was crucial for the Celtics, scoring all his 14 points in the last frame to make sure the Celtics stay unbeaten in the Las Vegas. D-Jax hit two 3-pointers, had some nice drives to the rim and dished out four assists on the night.

Ante Zizic finally got his first double-double this summer after being just one point shy in the previous matchup, ending the game with 12 points and game-high 13 rebounds for the Celtics. He also got two assists from nice passes and did this all in just 17 minutes of play!