When Jake Ellenberger takes to the Octagon at UFC 151 he’ll be looking to bounce back from a disappointing defeat to Martin Kampmann. However, the loss more likely on his mind when the cage door closes will be a stumble he suffered six years ago against the very man he’ll be facing at the event – Jay Hieron.

Hieron, who happens to be a friend/training partner of Kampmann’s, was the first man to ever beat Ellenberger, outpointing him in 2006 and ending the twelve-fight winning streak the Nebraskan had opened up his career with.

“It’s something that’s unsettling. It’s something I want to finish. Jay’s definitely improved in the last six years but he’s fighting to stay relevant in this sport, I’m fighting for a world title,” said Ellenberger in an extended preview of the September 1 event. “I’m taking all of my frustration, putting it into training, and finding a way to win. I’m gonna get revenge.”

Now 27-6, Ellenberger was on the cusp of a title-shot before succumbing to strikes against Kampmann in June. Comparably, the 23-5 Hieron has won eleven of his last twelve tilts with the lone exception involving a Split Decision defeat to Bellator champion Ben Askren.

Check out the video below featuring comments from Hieron, as well as UFC 151 headliners Jon Jones-Dan Henderson: