In Chicago, Loul Deng scored 22 points and Richard Hamilton 19 for the Bulls, who held defending champion Dallas to just eight points in the first quarter.
Dirk Nowitzki scored 17 points for Dallas. Rodrigue Beaubois added 16 as he started for Jason Kidd, who along with Jason Terry sat out the game to rest as the Texan side prepare for the playoffs.
Elsewhere, the Denver Nuggets clinched a Western Conference playoff spot with a 118-107 road victory over the Phoenix Suns.
Ty Lawson sparked the Nuggets with 29 points, making all five three-point attempts, and 10 assists.
Shannon Brown topped Phoenix with 28 points and Steve Nash collected 13 assists to pass Oscar Robertson for fifth place on the NBA all-time list.
For the Suns to make the postseason, they must win at Utah on Tuesday and defeat the San Antonio Spurs on Wednesday (Thursday, PHL time).
Philadelphia's playoff hopes got a big boost with a 109-106 overtime win over the playoff bound Indiana Pacers.
One more win would clinch a postseason spot in the East for the 76ers, who snapped a seven-game Indiana winning streak.
Jazz 117, Magic 107
SALT LAKE CITY - Devin Harris scored 21 points with seven assists and a crucial block on Saturday (Sunday, PHL time) as the Utah Jazz downed Orlando 117-107 in overtime to boost their NBA playoff bid.
Al Jefferson also scored 21 points and grabbed 10 rebounds for Utah, who strengthened their hold on the eighth and final playoff spot in the Western Conference.
They are one game ahead of Phoenix and Houston.
Ty Lawson starred for Denver, scoring a season-high 29 points that included making all five of his attempts from three-point range.
Denver are tied with reigning NBA champions Dallas for the sixth spot in the West with three games remaining.
The Jazz, meanwhile, will host the Suns on Tuesday (Wednesday, PHL time), when a Utah victory would put the Jazz in the post-season for the first time since 2010.
A win for Phoenix would keep the Suns alive because they hold the playoff tiebreaker.
Jameer Nelson led the Magic with 23 points. Jason Richardson and Ryan Anderson scored 21 points apiece for Orlando, who are bound for the playoffs without star Dwight Howard -- who had season-ending back surgery on Friday (Saturday, PHL time).