The Celtics opened a double overtime loss to the Knicks 134-138.
Jaylen Brown played 46 minutes, shooting 16-of-30 and 8-of-14 from three-point range, with 46 points, 9 rebounds, 6 assists and 3 steals.
The 46 points set a career-high for Brown and was also the highest score in Celtics' opener history.