Eric Bledsoe scored 26 points — one off his career high — and added a career-best 14 assists for Phoenix, which opened the season with home wins over Portland and Utah. The Suns stayed with Oklahoma City thanks to 14-of-37 3-point shooting but eventually were done in by 23 turnovers.
Serge Ibaka added nine points and 10 rebounds for Oklahoma City.
Phoenix led 79-73 after a 3-pointer by Bledsoe with 7:46 left, but the Thunder scored next eight points, including layups by Westbrook and Reggie Jackson, the latter putting Oklahoma City ahead 81-79 with 6:11 left.