Kevin Durant and the Oklahoma City Thunder found out just why the Grizzlies have three NBA All-Defensive players and a stinginess that earns them the right to be called the most oppressive team in the league.

It was a reminder Monday night that couldn’t have come at a worse time for the Thunder. The Grizzlies, though, did what they have all season — turned up their defense intensity when it mattered most.

Memphis held Oklahoma City to 1 of 8 shooting over the final five minutes of its 103-97 overtime victory in Game 4 of the Western Conference semifinal series in FedExForum.

The Griz took a commanding 3-1 lead in the best-of-seven series. Game 5 is Wednesday at Chesapeake Energy Arena in Oklahoma City.

The Thunder will need better clutch play from Durant if its wants to extend the series.

Durant missed all five of his shots in the overtime.

Mike Conley led the Griz with 24 points. Marc Gasol and Zach Randolph each chipped in 23 points for the Griz, who haven’t lost at home in the postseason.

The streak was in jeopardy for most of the night.

The Griz had one last chance to win with 6.2 seconds left in regulation. But overtime ensued when Thunder center Kendrick Perkins swatted away Randolph’s game-winning shot attempt from 18 feet.

Randolph made a couple of clutch plays on both ends of the court in the final minute of the fourth quarter. After splitting a pair of free throws that gave the Griz a 93-92 lead, Randolph stripped Durant of the ball and that defensive play led to Gasol eventually making one of two foul shots.