The NBA has opened an investigation into the Dallas Mavericks over its apparent tanking of Friday night’s game against the Chicago Bulls.

"The NBA commenced an investigation today into the facts and circumstances surrounding the Dallas Mavericks’ roster decisions and game conduct with respect to last night’s Chicago Bulls-Mavericks game, including the motivations behind those actions," league spokesman Mike Bass said.

On Friday, the Mavericks announced that Kyrie Irving and four major contributors would sit out the game against the Bulls.