OKLAHOMA CITY (AP) — The NBA's best-of-seven Western Conference final is now a best-of-three after the Thunder knotted the series in Oklahoma City.

Russell Westbrook poured in 40 points and Kevin Durant added 31 as the Thunder hammered San Antonio 105-92. Westbrook also provided 10 assists, five rebounds and five steals to help Oklahoma City stay unbeaten in two games since Serge Ibaka returned to the lineup.

Durant shot 11-for-22 in his highest-scoring game of the series after he was held to a 22.7-point average in the first three contests. Ibaka added nine points and eight rebounds for the Thunder.

The Spurs shot just 40 percent and never recovered after the Thunder built a 58-43 halftime lead. Tony Parker and Boris Diaw were San Antonio's top scorers with just 14 points apiece. Westbrook managed to outscore the Spurs' entire starting five 40-39.

San Antonio will host Game 5 on Thursday.