Veteran fighters and former lightweights Dennis Siver (21-9 MMA, 10-6 UFC) and Manny Gamburyan (13-7 MMA, 4-5 UFC) are set to collide at UFC 168.

UFC official today announced the matchup for the Dec. 28 event, which takes place at MGM Grand Garden Arena in Las Vegas. It's not yet known whether the bout will serve on the pay-per-view main card or prelims, which air on FOX Sports 1 and stream on Facebook.

Siver and Gamburyan both have reinvented themselves in the featherweight division, though their recent careers have diverged on paper.