Denver Nuggets star Michael Porter Jr. will be sidelined for the "foreseeable future" due to a back injury.

Porter left Saturday's 95-94 win over the lowly Houston Rockets in the opening quarter because of back tightness and sat out Monday's NBA game against the high-flying Miami Heat.

Prior to Denver's matchup with Miami, Nuggets head coach Michael Malone said Porter will continue to undergo testing on his back.

"There's no doubt, regardless of his mood, we all have to support Michael, just like we support Jamal [Murray]," Malone said.

"And again, Michael could be back in a week, it could be more than that. So when I say, 'foreseeable future,' I'm not really sure what that means, I just know that he's not playing tonight."

"This is a process where we're being very cautious, talking to doctors, getting imaging all that kind of stuff," Malone added.

Porter, who signed a max contract before the start of the season, has been averaging 9.9 points, 6.6 rebounds and 1.9 assists per game in 2021-22.