The second round of the NBA playoffs arrives Tuesday with four simultaneous series in the East and West, the EuroLeague Final Four semifinal bracket taking shape, and a final weekend of Liga ACB and Lega A regular-season play that will set the entire postseason picture in Europe.

The second round of the NBA playoffs opens on Tuesday with four series running in parallel, and for the first time in years, the East and West both carry genuine top-to-bottom weight. New York and Philadelphia renew a rivalry that went the full distance in the regular season, while Oklahoma City comes in off a dominant winter against the Los Angeles Lakers and will carry matching confidence against the same opponent. In the lower brackets, Detroit and Cleveland bring a mechanical, defense-first intensity to a series nobody has quite been able to predict, and San Antonio and Minnesota continue what has been one of the quieter but most tactically intricate rivalries in the league. Across the Atlantic, the EuroLeague Final Four is closing in fast: Tuesday brings the two semifinal pairings, and by midweek the continental bracket will have its finalists. The Liga ACB and Lega Basket Serie A round out the weekend with regular-season conclusions that carry playoff-seeding weight.

1. New York Knicks at Philadelphia 76ers: NBA Round 2

Tuesday, May 5 (7:30 PM ET)

The regular season between these two went 3-3, with the most recent meeting ending in a blowout at Madison Square Garden in February: Knicks 138, 76ers 89. That result said more about Philadelphia's vulnerabilities on the road (and the Knicks' capacity to punish passive perimeter defense) than it did about where the series stands heading into the second round. Jalen Brunson controls pace and shot selection from the point, and the Sixers will need their switching coverages to hold at the point of attack across long possessions. The tactical question is whether Philadelphia can generate enough offensive flow in the halfcourt to stay in games without leaning on their transition numbers. Watch for how each team defends the slot: both rosters have capable catch-and-shoot wings, and open midrange territory will define scoring runs.

2. Oklahoma City Thunder at Los Angeles Lakers: NBA Round 2

Tuesday, May 5 (9:30 PM ET)

Oklahoma City swept the Lakers in the regular season by an average of 25 points per game, per NBA.com/stats: results of 123-87, 139-96, 119-110, and 121-92 that weren't as close as the scorelines suggest in the middle two. Shai Gilgeous-Alexander has operated as the league's most difficult primary defender assignment for stretches of this season, and the Thunder's defensive system builds pressure from both the perimeter and the paint. LeBron James turns every playoff appearance into a study in positional advantage and endurance, and the Lakers will need him to control game tempo against a team that thrives on pushing pace after live-ball turnovers. The early stages of this second-round meeting will test whether OKC can replicate that regular-season control, or whether the playoff context brings different decision-making.

3. Detroit Pistons at Cleveland Cavaliers: NBA Round 2

Tuesday, May 5 (7:00 PM ET)

Detroit and Cleveland split their regular-season series 2-3 in the Cavaliers' favor, with all five games decided by four points or fewer, per NBA.com/stats. That margin of error doesn't widen in the playoffs. It compresses. The Pistons' defensive identity has been built around effort and physicality in the paint, and Cleveland's halfcourt offense tends to run through its bigs in high-leverage moments. The Cavaliers hold home-court advantage, which matters less in a series this close than the ability to execute in the final two minutes. Watch defensive rotations on the weak side: these teams both rely on late-rotation closeouts to limit second-chance possessions, and the team that loses that discipline in a close fourth quarter will lose the night.

4. San Antonio Spurs at Minnesota Timberwolves: NBA Round 2

Tuesday, May 5 (9:00 PM ET)

The Spurs and Timberwolves split 1-2 in the regular season, with all three meetings decided by single digits, an accurate signal of how fine the margins are in this matchup. San Antonio's season has been defined by growth: a young roster built around Viktor Wembanyama, who has developed into one of the more complete two-way players the league has seen in a draft class in some time. Minnesota comes in with Anthony Edwards as the highest-leverage player in the series on either side, capable of changing a game's complexion in a quarter. The tactical interest is the Spurs' switching range against Minnesota's pick-and-roll attack, and whether San Antonio can generate enough offensive volume in the halfcourt to stay competitive through full 48-minute commitments.

5. Hapoel Tel Aviv vs. Real Madrid: EuroLeague Playoff

Tuesday, May 5 (9:00 PM CET / 3:00 PM ET)

The EuroLeague playoffs have reached the point where every game carries elimination stakes, and Real Madrid arrives at this semifinal stage having been among the most consistent programs in the competition across multiple seasons. Hapoel Tel Aviv's playoff run has been built on home-court energy and a defensive scheme that disrupts transition offenses, and Real Madrid's pace-and-space attack will face a genuine test. The tactical gap between these two clubs on paper is narrower than it appears once the playoff bracket reduces the margin for passive defending. Watch how Real Madrid's backcourt handles the Tel Aviv defensive press in the first half: early turnover rates have shaped the outcome of most of their playoff meetings historically.

6. Monaco vs. Olympiacos: EuroLeague Playoff

Tuesday, May 5 (9:00 PM CET / 3:00 PM ET)

Monaco has been one of the more unsettling opponents in the EuroLeague bracket, a team that conceals its best defensive capabilities until the series demands them. Olympiacos is one of European basketball's most durable franchises, and their ability to stay organized in high-pressure possessions late in close games has defined their playoff identity for years. This semifinal matchup pits two clubs with genuine Final Four ambitions and the coaching depth to make adjustments across games. The half-court battle will be the deciding theater: Monaco's transition advantage largely disappears when Olympiacos controls tempo, and the Greek club is experienced at doing exactly that.

7. Liga ACB Weekend: Regular-Season Round, May 9-10

Saturday-Sunday, May 9-10

The Liga ACB regular season reaches its final weekend, and positioning in the top four carries home-court implications for the playoff bracket. The Spanish competition has produced some of the tightest final-table races in recent memory, with multiple clubs separated by narrow game differentials heading into the last round. The weekend's games will decide seeding in the quarterfinals, and teams with secured positions may manage rotation minutes with the postseason immediately ahead. For the teams on the bubble, the urgency is different: a single loss in this round could mean a longer path, or no path at all.

8. Lega Basket Serie A: Full Round, Sunday May 10

Sunday, May 10 (All day)

The Lega A schedules its entire final regular-season round on a single day: seven games in parallel on Sunday. That format means no club can track its rivals' results in real time and adjust; everything resolves simultaneously. The playoff field in the Italian top flight is nearly set, but the seeding margins are tight enough that the final positions won't be confirmed until the day's last buzzer. For clubs chasing a top-two seed and the home-court advantage that comes with it, the margin for error this weekend is zero.

The must-watch: Knicks at 76ers on Tuesday night. The regular-season history, the arena, the tactical weight between Brunson and Philadelphia's defensive assignments. This opening game will set the tone for what could be the East's most contested second-round series.