OKLAHOMA CITY -- Victor Wembanyama had 41 points and 24 rebounds, Dylan Harper finished with 24 points and a team playoff-record seven steals, and the San Antonio Spurs beat the Oklahoma City Thunder 122-115 in a double-overtime classic to open the Western Conference finals Monday night.

Wembanyama sealed the victory with two dunks in the final minute, one resulting in a three-point play, as the Spurs stole home-court advantage and beat the Thunder for the fifth time in six meetings this season.

Stephon Castle scored 17 points, Devin Vassell and Keldon Johnson each had 13, and Julian Champagnie added 11 for the Spurs, who were without De'Aaron Fox due to ankle stiffness.

Alex Caruso tallied 31 points, the second-highest scoring game of his career, off the bench for the Thunder, ending their nine-game playoff winning streak dating back to last season's Finals. Jalen Williams returned from a six-game absence due to a hamstring strain and scored 26 points for the Thunder, while Shai Gilgeous-Alexander -- on the night he received his second straight Most Valuable Player trophy -- had 24 points and 12 assists but shot 7 for 23.

This was the sixth Game 1 in NBA playoff history to go into double overtime -- the first since a Spurs-Warriors game in 2013. Wembanyama's performance in clutch time was crucial, as he scored 16 points on 6-of-9 shooting in the final 15 minutes of the game.

The Spurs were up by 10 with 9:10 left in regulation, but the Thunder fought back, leading to a frantic final stretch where the lead changed hands twice and the game was tied three times in less than two minutes. Wembanyama had an off-balance chance to win it on the last play of regulation, but Chet Holmgren blocked the shot.

Gilgeous-Alexander had his worst first half, shooting-wise, in nearly three years -- 1 for 5 from the field, four points. It was the first time since Oct. 29, 2023, a span of 270 appearances including playoffs, that he didn't have at least two field goals before halftime.

The Spurs' lead was only seven at the break, 51-44. Gilgeous-Alexander managed to get a few shots to fall in the third, and the Thunder briefly reclaimed the lead. However, the Spurs maintained their composure and the margin was still seven as they went into the fourth quarter, leading 80-73.

Game 2 is set for Wednesday at Oklahoma City.