Despite a strong fourth quarter, the Bulls were beaten 107-95 by the Miami Heat, with Rose scoring four times from 15 attempts to add 12 points.
The small forward told ESPN: "This was the toughest team he could have come back against. But I've seen Derrick at his best, and I know he's better than he was. His work ethic is better. His belief in himself and in his teammates is better."
Chicago play the New York Knicks tomorrow.