There is a misconception, common in NBA circles, that Spurs coach Gregg Popovich doesn’t care about earning a No. 1 playoff seed.

That isn’t accurate, exactly.

“No one would turn it down if given,” Popovich said. “You wouldn’t give it up if you had it.”

That ball is in Oklahoma City’s court now.

Russell Westrbook had 27 points, Kevin Durant scored 25 and old Spurs nemesis Derek Fisher emerged from hibernation long enough to send the Thunder to a 100-88 victory Thursday at Chesapeake Energy Arena that puts them in the lead to claim the Western Conference’s top seed.

Fisher, who had totaled 13 points in his previous nine games, erupted for 17 — including four first-half 3-pointers — to help spark the OKC victory.

With it, the Thunder (55-20) pull within a half-game of the Spurs (56-20) atop the West standings, but the deficit is only a matter of mathematics. Tied in the loss column, and likely owner of the tiebreaker, OKC controls its own destiny the rest of the way.

The Spurs and Thunder split the season series at two games apiece. If the teams end the season with identical records, the knot would be unraveled based on record against Western Conference teams.

After Thursday, the Spurs are 32-15 against the West. OKC is 35-13.

“It’s going to be a dogfight until the end,” said Tony Parker, who finished with two points in 25:27 and played just two minutes in the fourth quarter.

“Every game is going to count. We’re going to do our best to keep first place, but if we don’t finish first it’s not the end of the world, either.”