The Chicago Bulls could be without the services of Kris Dunn and Otto Porter Jr. for Saturday night's game against the Utah Jazz, according to a report from K.C. Johnson of the Chicago Tribune.

Johnson reports that Dunn, who is now listed as questionable, did not participate in Friday morning's practice session due to a back issue. If Dunn is not cleared for action, Ryan Arcidiacono will likely see an uptick in his usage rate.

Porter, who's listed as doubtful, has missed Chicago's last two games with a right rotator cuff strain. Shaq Harrison drew a starting nod for the Bulls on Wednesday night, recording 18 points, six rebounds and four steals in 39 minutes of action. If Porter is indeed ruled out for Saturday's matchup, Harrison will likely be called on again.

The Bulls acquired Porter from the Washington Wizards at this season's trade deadline. In 15 appearances with his new team (all starts), the former No. 3 overall pick has racked up averages of 17.5 points on 48.3 percent shooting from the field (48.8 percent from beyond the arc), 5.5 rebounds, 2.7 assists and 1.2 steals in 32.8 minutes per outing.

Dunn has played in 45 games this season (43 starts), averaging 11.4 points on 43.0 percent shooting (35.4 percent from downtown), 6.0 assists, 4.1 rebounds and 1.5 steals in 30.4 minutes per contest.

In other Bulls-related injury news, Zach Lavine is still listed as day-to-day with a thigh contusion. He was upgraded to probable for Wednesday's game, but the team ultimately chose to hold him out for precautionary measures. He'll likely be a game-time decision against the Jazz.

Saturday's Bulls-Jazz matchup is scheduled to tip inside the United Center at 8:00 p.m. ET.