Celtics ring in the new season looking like champions yet again Yahoo SportsCeltics raise banner 18 as franchise greats look on ESPNFrom Bob Cousy to Jaylen Brown and Jayson Tatum, Celtics history is second to none The Boston GlobeTNT slammed for cutting to commercial during Celtics Banner 18 raising: ‘Disrespectful’ Boston HeraldCeltics-Knicks recap: C’s tie NBA 3-point record in Opening Night rout NBC Sports Boston