The Oklahoma City Thunder are unbeaten through two rounds of the NBA playoffs, but their sweep of the Los Angeles Lakers may matter most because it was not entirely comfortable. Oklahoma City beat Los Angeles 115-110 in Game 4 on Monday night at Crypto.com Arena, completed a second straight postseason sweep and improved to 8-0, yet the Lakers finally forced the defending champions into the kind of late-game problem-solving that can shape a deeper playoff run.

Shai Gilgeous-Alexander led the Thunder with 35 points, Ajay Mitchell added 28 points in another major postseason performance, and Chet Holmgren scored the go-ahead basket on a dunk with 32.8 seconds left. The final minute was the closest the Thunder had come to losing this spring: Los Angeles had surged ahead 110-109 after Rui Hachimura’s four-point play and Marcus Smart’s three-point play, only for Oklahoma City to close with Holmgren’s basket and free throws from Gilgeous-Alexander and Mitchell.

The result kept Oklahoma City perfect in the postseason and sent the Thunder back to the Western Conference finals, where they will face the winner of the San Antonio Spurs-Minnesota Timberwolves series. The path there has been strikingly clean. Oklahoma City swept its first-round opponent, then swept the Lakers, becoming the first Thunder team to sweep back-to-back playoff series. According to NBA.com, only three other defending champions have opened a playoff run 8-0: the 2016-17 Cleveland Cavaliers, the 2000-01 Lakers and the 1988-89 Lakers.

Still, Oklahoma City’s message after the Lakers series was not that the job was complete. The Thunder were pushed into fourth-quarter deficits for the first time in these playoffs during Game 4, and the Lakers’ defensive adjustments gave Oklahoma City more resistance than it had faced in the first seven games. Los Angeles sent traps and double-teams at Thunder ball-handlers, particularly Gilgeous-Alexander, in an effort to disrupt Oklahoma City’s rhythm and force secondary decision-makers to carry possessions.

That approach did not save the Lakers’ season, but it did make the Thunder sharpen. Coach Mark Daigneault said after the win that the Lakers’ defensive pressure made Oklahoma City better by the end of the series, particularly in how the Thunder attacked traps and found interior passing angles. That was visible in the closing sequence, when Oklahoma City answered pressure not with rushed perimeter shots but with a decisive play to Holmgren at the rim.

The Thunder’s response also underscored the value of their depth. Mitchell’s rise has become one of Oklahoma City’s most important developments of the postseason. With Jalen Williams out, Mitchell has taken on a larger on-ball role and has not looked overwhelmed by the stage. He scored 10 of his 28 points in the fourth quarter of Game 4, providing the kind of late-game creation and composure that usually has to come from a team’s established stars.

Gilgeous-Alexander remains the central force, but the Lakers series showed that Oklahoma City can survive defensive schemes built around making his life difficult. The Thunder won with Gilgeous-Alexander scoring at a high level, but also with Mitchell creating, Holmgren finishing, and other rotation pieces keeping possessions connected. That balance has been a defining feature of Oklahoma City’s title defense: the Thunder can play fast, defend aggressively, score through their star, or lean into a deeper cast when opponents overload the top of the floor.

Los Angeles’ resistance made Game 4 the most revealing contest of the series. The Lakers were blown out in multiple meetings with Oklahoma City earlier in the season and postseason, but they finally found a formula that created stress. Austin Reaves scored 27 points, Hachimura added 25, and James finished with 24 points and 12 rebounds in what could become a significant transition point for both the player and the franchise. The Lakers played without Luka Doncic, who missed the final stretch of the season with a hamstring injury, and still pushed the Thunder into the final possessions.

The Lakers’ late surge was built on pride and shot-making. They trailed by double digits in the third quarter before turning the game with a 39-point period, then kept trading baskets in the fourth. Reaves’ scoring, Hachimura’s timely shooting and Smart’s late drive gave Los Angeles a real chance to steal the game and force a Game 5. But James missed a late attempt near the rim, Reaves missed a potential tying 3-pointer, and Oklahoma City’s free-throw shooting sealed the sweep.

For the Lakers, the defeat ends a season that already had been reshaped by injuries and uncertainty. James, now deep into an unprecedented career, said after the game that he did not know what the future held and would take time to reassess. Los Angeles advanced one round but remained short of the conference finals, and the sweep against Oklahoma City reinforced the gap between a veteran team trying to extend a window and a champion still expanding its own.

For the Thunder, the significance is different. Oklahoma City did not simply beat the Lakers eight times across the regular season and playoffs; it absorbed a new set of tactical questions at the most useful possible moment. The Lakers’ traps, changing defensive looks and late-game pressure produced teaching film without producing a loss. That combination is rare. Most teams learn those lessons after a defeat. Oklahoma City learned them while staying unbeaten.

The Western Conference finals will bring a different opponent and a different set of problems. San Antonio’s length and young star power would test Oklahoma City in one way; Minnesota’s physicality and Anthony Edwards-led shot creation would test it in another. Either matchup will likely demand more half-court precision than the Thunder needed for much of the first two rounds.

That is why the Lakers series may ultimately be remembered as more than another sweep. Oklahoma City’s record stayed spotless, but the Lakers finally made the Thunder uncomfortable. The defending champions responded by finding a sturdier late-game gear, one built on spacing, patience, role-player confidence and defensive calm. At 8-0, the Thunder already looked like the NBA’s most complete team. After the Lakers forced them to solve a real playoff problem, they may also be more prepared for the hardest part of the title defense still ahead.