The Boston Celtics blew a 27-point first-half lead before going down 123-111 to the Atlanta Hawks in double-overtime on Friday.
Kyle Korver starred with 27 points, while Al Horford had 24 points and 13 rebounds and Josh Smith added 17 points and 14 boards for the Hawks.
Kevin Garnett posted 24 points and 10 rebounds before fouling out in the second overtime as Boston slumped to their sixth straight loss.
Despite the loss, Boston point guard Rajon Rondo recorded 16 points, 11 assists and 10 rebounds for his fifth triple-double of the season.
Meanwhile, the resurgent Washington Wizards posted their fourth consecutive win at home after beating the Minnesota Timberwolves 114-101.
Dwyane Wade scored 29 points as the Miami Heat rallied from nine points down in the second quarter to defeat the Detroit Pistons 110-88.
Kirk Hinrich posted a season-high 25 points as the Chicago Bulls clinched a 103-87 victory over the Golden State Warriors.
Marc Gasol had 20 points and nine rebounds as the Memphis Grizzlies swept aside the Brooklyn Nets 101-77.
Kyrie Irving scored 35 points as the Cleveland Cavaliers recovered from 20 points down in the third quarter to beat the Milwaukee Bucks 113-108.
James Harden led with 30 points as the Houston Rockets earned a 100-82 win over the New Orleans Hornets.
Tony Parker scored 23 points to guide the San Antonio Spurs to a 113-107 victory over the Dallas Mavericks.
Kevin Durant recorded 24 points and 11 rebounds as the Oklahoma City Thunder accounted for the Sacramento Kings 105-95.
Finally, Metta World Peace scored 17 points as the Los Angeles Lakers kept their playoff hopes alive with a 102-84 victory over the Utah Jazz.