Former OSU star Marcus Smart stole the ball from Shai Gilgeous-Alexander in the last seconds yesterday to preserve a 112-111 Celtics win over the Thunder.
OKC had trailed 110-101 with just 1:40 to play when the Thunder went on a 10-2 run to get the game close but Smart's play ended the chance of another Thunder comeback win.
SGA and Danilo Gallinari led OKC with 24 points each, Chris Paul and Dennis Schroder each had 22.
The Thunder host the Spurs on Tuesday night.