The Los Angeles Lakers will have to go through the play-in tournament, while the Utah Jazz finished with the league's best record.
Giannis Antetokounmpo produced a performance not seen since Charles Barkley in the 1980s as the Milwaukee Bucks won again.
The Atlanta Hawks and New York Knicks will feature in the playoffs, while James Harden returned to the court following an injury lay-off.
The Golden State Warriors won behind Stephen Curry's brilliance as Russell Westbrook became the triple-double king on Monday.
Russell Westbrook now tops the list for the most triple-doubles in league history.
Russell Westbrook and Bradley Beal led the Washington Wizards to an overtime win against the Toronto Raptors.
Joel Embiid fuelled the streaking Philadelphia 76ers as Russell Westbrook posted another triple-double midweek.
Anthony Davis scored 25 points in LeBron James' absence as the Los Angeles Lakers moved back up to fifth in the West.
The Indiana Pacers showed no mercy against the Oklahoma City Thunder, while the Denver Nuggets took down the Los Angeles Clippers.
Jayson Tatum tied Larry Bird's Celtics all-time single game scoring record in their over-time win over the San Antonio Spurs.