Oklahoma City, OK (Sports Network) - Kevin Durant scored half of his 36 points in the fourth quarter and the Thunder got some unexpected offense from Serge Ibaka to beat the Spurs, 109-103, tying the Western Conference finals after four games.

The 6-foot-10 Ibaka, known more for his defense, had 26 points and made all 11 of his field goal attempts.

The Spurs won 10 consecutive playoff games before losing on Thursday. Now they head back to San Antonio for Game 5 Monday trying to just maintain homecourt advantage.

Tim Duncan had 21 points and eight rebounds for the Spurs.

GAME NOTES:

The Sports Network