December 13, 2021 10:34 pm Udoka: I told Tatum opponents “aren't your older brother” Ime Udoka shares a conversation he had with Jayson Tatum and the whole team about being more aggressive and not treating opposing players with too much deference. Celtics Videos 0:54 Jaylen: C's ‘came out too casual' in Christmas Day loss to Sixers 2:14 INSTANT REACTION: Celtics drop Christmas Day matchup vs. Sixers 1:32 ‘Twas the night before C'smas… 0:31 Kristaps Porzingis chalks up scuffle with Bitadze as ‘just normal NBA action' 0:44 Jaylen Brown reacts to loss to Magic: We should've met their physicality better