The Hawks had won eight of nine over the Cavaliers. Atlanta has lost four in a row for the first time since closing the 2010-11 season on a six-game slide.
Varejao's injury was originally diagnosed as a bruised right knee, but he still wasn't ready to practice. He will have surgery on Thursday at The Cleveland Clinic. The team said Dr. Richard Steadman in Vail, Colo., provided a second opinion on the injury.
NOTES: The Hawks are 7-3 in the second leg of back-to-back games. ... Harris, who went into the game averaging 7.7 points, was scoreless in 13 minutes. ... Atlanta hosts Utah on Friday night. ... Cleveland begins a five-game road trip in Denver on Friday night. ... Gibson has missed the last six games. He was injured against the Hawks after a collision with Morrow.