Durant and Westbrook lead dominant Thunder in Game 1, routing Harden's Rockets 120-91

Oklahoma City Thunder forward Kevin Durant, left, reacts on the bench during the first quarter of Game 1 of a first-round NBA basketball playoff series against the Houston Rockets in Oklahoma City, Sunday, April 21, 2013. Thunder center Kendrick Perkins watches at right. (AP Photo/Sue Ogrocki) (The Associated Press)

Oklahoma City Thunder guard Russell Westbrook (0) drives the lane against the Houston Rockets in the first quarter of Game 1 of their first-round NBA basketball playoff series in Oklahoma City, Sunday, April 21, 2013. (AP Photo/Sue Ogrocki) (The Associated Press)

Kevin Durant scored 24 points, Russell Westbrook made a run at a triple-double in three quarters and the Oklahoma City Thunder routed ex-teammate James Harden and the Houston Rockets 120-91 on Sunday night in Game 1 of their playoff series.

After letting Houston wipe away an 11-point deficit in the first half, the Thunder regained control with a 14-1 surge just before halftime and kept pouring it on.

Just after a fan nailed a half-court shot to win $20,000 in the break after the third quarter, Durant drove for a two-handed slam while getting fouled and Oklahoma City was soon up by 30.

Harden, playing against the team that traded him away just before the season started, had 20 points but the league's second-highest scoring offense was held 15 points below its regular-season average while shooting 36 percent.

Game 2 is Wednesday night in Oklahoma City.