Kevin Durant scored half of his 36 points in the fourth quarter on Saturday as Oklahoma City Thunder beat San Antonio Spurs 109-103 to tie the NBA Western Conference Finals at two games apiece.

Defensive stalwart Serge Ibaka contributed some unexpected offence, scoring 26 points on perfect 11-for-11 shooting for Thunder, which improved to 7-0 at home this post-season.

Kendrick Perkins added 15 points with nine rebounds for Oklahoma City, helping make up for a lacklustre night for Russell Westbrook, who scored just seven points on 2-for-10 shooting. Tim Duncan scored 21 points with eight rebounds for San Antonio.

The result: Oklahoma City Thunder 109 (Kevin Durant 36, Serge Ibaka 26, Kendrick Perkins 15) bt San Antonio Spurs 103 (Tim Duncan 21, Kawhi Leonard 17, Ginobili 13) (series tied 2-2).

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