Alexander has been diagnosed with a left rib contusion, Vanessa Richardson of Space City Home Network reports.
Alexander took a shot to the side in Monday's Las Vegas Summer League win over the Bulls and was taken off the court on a stretcher. However, he has seemingly avoided a serious injury and can be considered highly questionable for Wednesday's game against the Spurs. Even if he doesn't return in Las Vegas, it appears likely he'll be ready for the start of training camp.