NBA Opening Night & Christmas Day schedule: 🏀 Celtics @ Pistons 🏀 76ers @ Knicks 🏀 Thunder @ Spurs 🎄 Spurs @ Knicks 🎄 Heat @ Celtics 🎄 76ers @ Lakers 🎄 Thunder @ T-Wolves 🎄 Nuggets @ Warriors t.co/wjrZJ0KgIz