(Reuters) - The Oklahoma City Thunder almost blew a 10-point lead in the fourth quarter but dug deep to turn back the Portland Trail Blazers 87-83 on Sunday.

Kevin Durant, who had 42 points against the Lakers on Friday, stepped up with 33 against the Trail Blazers but his team saw their 10-point advantage with 3 1/2 minutes remaining shrink to just one.

Portland ran off nine straight points to pull within 84-83 with 21 seconds left, capped by Nicolas Batum's three-pointer, but LaMarcus Aldridge missed a potential game-tying shot and Oklahoma City clinched the game at the free throw line.

Despite his late miss, Aldridge had a massive game with 33 points and 11 rebounds while Batum finished with 21.

The Thunder's 87 points was their lowest scoring total since they put up 84 in a season-opening loss to San Antonio.

Oklahoma City (29-8) grabbed their fifth win in six games to stay top of the Western Conference while the Blazers (20-17) dropped their second straight.

(Writing by Jahmal Corner in Los Angeles; Editing by Peter Rutherford)