The NBA has always been fueled by legendary rivalries—Bill Russell vs. Wilt Chamberlain, Larry Bird vs. Magic Johnson, Michael Jordan vs. the Bad Boy Pistons, and LeBron James vs. Stephen Curry. Now, the league is ready to write its next great chapter.

This Monday, the Oklahoma City Thunder and San Antonio Spurs tip off Game 1 of the Western Conference Finals, and the stakes couldn't be higher. The Thunder enter as the reigning champions, led by soon-to-be two-time MVP Shai Gilgeous-Alexander. On the other side, Victor Wembanyama and his upstart Spurs look like the biggest threat to Oklahoma City's dynasty dreams.

These two teams already know each other well. During the 2025-26 regular season, they squared off five times, including a showdown in the NBA Cup semifinals. The Spurs won three of those first four meetings—and here's the scary part for Thunder fans: Wembanyama came off the bench in each of those early victories. Oklahoma City's lone win came in mid-January, but the Spurs closed out the season series with another statement victory.

Of course, regular-season success doesn't always carry over to the playoffs. Just ask the Toronto Raptors, who learned that lesson the hard way against LeBron James and the Cavaliers. But with Wembanyama's unique two-way dominance and a star-studded Spurs backcourt, San Antonio presents challenges that could derail Oklahoma City's repeat bid.

History tells us the best rivalries aren't born in the regular season—they're forged in the playoff fire. Russell and Wilt clashed eight times in the postseason; Bird and Magic met three times in the NBA Finals. This Western Conference Finals has all the ingredients to become that next iconic matchup.

Get ready. The NBA's next great rivalry is about to take off.