"People might talk about me getting 50, but Russell Westbrook carried us in overtime," Durant said.
It was a wildly back-and-forth game from the start, with big swings in either direction.
The Thunder had a 16-2 run to dig out of an early hole, then gave up a 29-7 Nuggets run to trail 46-32 with 6:29 left before halftime — their largest deficit at Chesapeake Energy Arena this season.
Oklahoma City took care of that with a 20-0 run spanning halftime, going up 65-58 after Durant's right-handed slam with 8:04 left in the third.
Then it was Denver's turn again, rallying to take a brief lead late in the third and then getting back-to-back 3-pointers from Al Harrington just after Durant and Westbrook re-entered for a 93-84 advantage with 8:50 to play.
After Oklahoma City came back to tie it, Lawson hit a 3-pointer and Harrington made two free throws for a 111-106 Denver lead with 43 seconds left. Durant hit a second-chance 3-pointer from the top of the key with 30 seconds left and then drove past Chris Andersen for a dunk with 4.4 seconds remaining to tie it up.
"We were kind of laughing and saying, 'When was the last time he missed a shot in the fourth quarter against us?' He makes everything," Karl said.
"There's an offensive rebound. Why does he come wide open? Why can't someone else come wide open?"
NOTES: Thunder reserve Lazar Hayward was out with a fractured left orbital floor after being poked in the eye late in Oklahoma City's win against Golden State on Friday. ... The Nuggets (103.4) and Thunder (101.6) are two of three teams averaging more than 100 points per game, trailing only Miami (103.7) in the NBA rankings. ... Lenny Wilkens, Gary Payton, Shawn Kemp and Jack Sikma are among the 12 players with triple-doubles for the Seattle SuperSonics. Westbrook is the only one other than Ibaka to do it with the Thunder.