The Milwaukee Bucks clinched the best record in the league and the No. 1 overall seed in the playoffs with a win over the Chicago Bulls.
Khris Middleton had to leave the game early due to continued issues with his knee.
Bucks head coach Mike Budenholzer described Middleton's injury as "right knee soreness" and a re-aggravation of a previous issue.
Middleton has been dealing with injuries on and off for the past year, including a sprained MCL in his left knee and irritation in his right knee.
Middleton has missed games for "knee injury management" and has not played in both games of a back-to-back.
Middleton has maintained that there is nothing seriously wrong with his knee and attributed it to getting back into game shape after extended periods of time off.
The Bucks will need Middleton at 100 percent for the playoffs to defend their title and win a second championship in three years.
Kyrie Irving's arrival with the Dallas Mavericks has not gone as expected, with the team struggling and losing games since the trade deadline.
The Mavericks have a poor record of 8-16 since acquiring Irving, and only four teams have worse records over that span.
Irving's arrival has affected the Mavericks' playoff chances, with their odds dropping from 58% to 6% according to SportsLine.