The NBA's 2026–27 season wasted little time delivering surprises. Philadelphia spoiled the New York Knicks' championship celebration with a 106–100 victory October 20, Oklahoma City defeated San Antonio 116–104 in a Western Conference finals rematch, and Detroit stormed back from 22 points down to beat Boston 121–113.
The opening-night tripleheader brought major offseason changes into focus. LeBron James made his Philadelphia debut alongside former Celtics star Jaylen Brown, Shai Gilgeous-Alexander led the Thunder past the team that ended their previous season, and the Pistons mounted a remarkable fourth-quarter comeback.
With established contenders adjusting to new lineups and rising teams eager to challenge them, the three games offered an early glimpse of the competition awaiting both conferences.
76ers spoil Knicks' championship celebration
Philadelphia arrived at Madison Square Garden with a dramatically different roster and left with a victory over the defending NBA champions.
Tyrese Maxey led the 76ers with 28 points, while Brown added 19 points and eight rebounds in his first regular-season appearance for Philadelphia. Joel Embiid contributed 13 points and 11 rebounds, and James finished with 14 points and nine rebounds as he began his record 24th NBA season.
The 106–100 victory over New York interrupted an emotional evening for the Knicks, who raised their first championship banner in 53 years before tipoff. New York entered the season hoping to build on its 2026 title, but Philadelphia's new-look lineup presented an immediate challenge.
The 76ers trailed by double digits before recovering, with their defense proving particularly effective in the closing minutes.
Jalen Brunson scored 21 points for New York but made only six of his 19 field-goal attempts. Philadelphia repeatedly disrupted the Knicks' offensive possessions, particularly when Brunson tried to create opportunities through screens involving Embiid's defensive assignment.
Embiid struggled with his own shooting, going 4-for-15 from the field. Yet his ability to defend around the basket and recover against smaller players remained crucial to Philadelphia's performance.
The Knicks nearly turned the game around when Karl-Anthony Towns hit a three-pointer to trim the deficit to one point with 4:37 remaining. Philadelphia responded by limiting New York to scores on just two of its final eight possessions.
For the 76ers, the victory offered an encouraging first look at a roster built around an unusual combination of experience and scoring talent. Maxey remained the leading offensive option despite the arrivals of James and Brown, while Embiid supplied a defensive presence that helped secure the win.
The larger test will be maintaining that balance. Embiid's availability has been a recurring concern in recent seasons, and Philadelphia must develop chemistry among four players accustomed to significant offensive responsibilities.
Thunder overpower Spurs in Western Conference rematch
Oklahoma City began its season with a convincing win over San Antonio, answering an early question about how it would respond to the opponent that eliminated it from the 2026 playoffs.
Gilgeous-Alexander scored 32 points, extending his NBA-record streak of games with at least 20 points to 141. Jared McCain added 20 points, making six of eight three-point attempts as the Thunder's bench outscored San Antonio's reserves 48–29.
The matchup carried added significance after the Spurs defeated Oklahoma City in seven games in the Western Conference finals, including a 111–103 victory in the deciding game on May 30.
According to the Associated Press game recap, Oklahoma City led 65–44 at halftime after holding San Antonio to 16 second-quarter points. The Thunder built a lead of as many as 26 points before the Spurs found some offensive rhythm after the break.
San Antonio opened the third quarter with a 23–9 run, briefly reducing the deficit to single digits. But Oklahoma City's scoring depth prevented the Spurs from completing the comeback.
The biggest difference came in the matchup between Victor Wembanyama and Oklahoma City's frontcourt.
Wembanyama finished with 12 points, 13 rebounds and six blocks, but made only one of his 13 field-goal attempts. His lone basket came on an alley-oop from De'Aaron Fox near the end of the third quarter.
Thunder center Chet Holmgren played an important role in making Wembanyama uncomfortable offensively, while rookie Aday Mara provided additional size and defensive resistance.
Wembanyama acknowledged afterward that hesitation and overthinking contributed to his struggles, rather than suggesting that a physical issue affected his shooting.
San Antonio coach Mitch Johnson also experimented with a three-guard starting lineup featuring Dylan Harper, Fox and Stephon Castle. The arrangement offers multiple playmakers, although the opener showed how difficult it can be to create consistent offensive opportunities when Wembanyama is contained.
For Oklahoma City, McCain's perimeter shooting was especially encouraging. His ability to capitalize when defenders focused on Gilgeous-Alexander helped the Thunder maintain pressure without relying entirely on their star guard.
The victory does not erase San Antonio's playoff success, but it demonstrated that Oklahoma City's defense and supporting cast remain formidable against one of its toughest Western Conference rivals.
Pistons erase 22-point deficit with stunning 23–0 run
Detroit produced opening night's most remarkable turnaround, recovering from a 22-point deficit to defeat Boston 121–113 at Little Caesars Arena.
The Celtics led 72–50 midway through the third quarter and still held a 99–89 advantage with 8:19 remaining in the fourth. What followed completely transformed the game.
Detroit scored 23 consecutive points in approximately five minutes, turning that 10-point deficit into a 112–99 lead. The rally became the NBA's largest opening-day comeback since the league began tracking detailed play-by-play data in 1997–98.
According to the NBA's account of Detroit's comeback, Duncan Robinson was central to the fourth-quarter surge. He scored 15 of his 21 points in the final period, repeatedly finding scoring opportunities as Boston's defense struggled to contain Detroit's momentum.
Javonte Green provided another spark, scoring all 19 of his points after halftime. Cade Cunningham and Jalen Duren each finished with 22 points, giving the Pistons contributions from several players as they clawed their way back.
Detroit also dominated the rebounding battle, collecting 59 boards to Boston's 45, and outscored the Celtics 44–34 in the paint.
Those advantages helped the Pistons overcome a difficult first half, when their outside shooting offered little indication of the offensive surge to come.
Boston's defeat overshadowed a memorable individual performance from Paul George. The veteran forward scored 38 points and made seven three-pointers in his first game with the Celtics, setting a franchise record for points in a debut.
The Celtics' official account of George's performance also credited him with five steals, highlighting his contributions on both ends of the floor.
But Boston's offense stalled at the worst possible time. Jayson Tatum finished with 13 points on 6-for-23 shooting, and the Celtics were unable to answer Detroit's decisive run.
The loss exposed an immediate concern for a Boston team adjusting to Brown's departure: even an exceptional scoring performance from George was not enough to preserve a commanding lead.
For Detroit, the victory was an early reminder of the value of defensive persistence, rebounding and contributions beyond its established stars.
Early tests await Philadelphia, Oklahoma City and Detroit
The three winners have little time to celebrate before returning to action.
Philadelphia hosts Cleveland on October 22, giving James his first regular-season home game with the 76ers against the franchise where his NBA career began. Oklahoma City welcomes Denver the same day for a matchup featuring Gilgeous-Alexander and Nikola Jokić.
Detroit travels to Miami on October 23, while Boston hosts New York in another early Eastern Conference matchup. The NBA's 2026–27 regular-season schedule provides the full slate of upcoming games.
Opening night cannot determine which teams will contend deep into the playoffs. Philadelphia still needs to establish its chemistry, Oklahoma City must sustain its defensive intensity, and Detroit will need more than occasional bursts of outstanding shooting.
Yet each victory offered something tangible: Philadelphia closed out a defending champion, Oklahoma City controlled a difficult conference rival, and Detroit refused to surrender a game that appeared lost.
The season has barely begun, but those performances have given the NBA's leading contenders plenty to think about before their next meetings.