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Sue Ogrocki, Associated Press
Oklahoma City Thunder guard James Harden, toip, shoots against San Antonio Spurs guard Danny Green, bottom, left, and guard Tony Parker, of France, during the first half of Game 4 in the NBA basketball playoffs Western Conference finals, Saturday, June 2, 2012, in Oklahoma City.

OKLAHOMA CITY — Kevin Durant scored 18 of his 36 points in a scintillating final 7 minutes, Serge Ibaka added a career-high 26 points and the Oklahoma City Thunder evened the Western Conference finals at two games apiece by beating the San Antonio Spurs 109-103 Saturday night.

After seeing his team's 15-point lead dwindle to four, Durant took over midway through the fourth quarter by scoring all 16 of the Thunder's points during a span of just over 5 minutes to keep the Spurs at bay.

With All-Star teammate Russell Westbrook limited to seven points, Durant did almost all of the damage late to send the series back to San Antonio all square for Game 5 on Monday night.

Tim Duncan had 21 points for San Antonio, which had won 20 in a row before losing Game 3.