The Hendricks-Kampmann winner is expected to be designated UFC's top contender at 170 pounds.
Hendricks (13-1) put himself in the title conversation on Dec. 30, 2011, when he knocked out perennial contender Jon Fitch in 12 seconds.
But it was his split decision over Josh Koscheck on May 5 that secured a spot in the title eliminator with Kampmann.
A second-round knockout of Jake Ellenberger on June 1 extended Kampmann's win streak to three. He will take a pro record of 20-5 into the cage against Hendricks.