UFC lightweight Jim Miller (17-2 MMA, 6-1 UFC) goes for his fifth straight victory, and Gleison Tibau (21-6 MMA, 6-3 UFC) goes for his fifth win in six fights when the pair meets this fall.

A source close to the event told MMAjunkie.com (www.mmajunkie.com) at least one fighter has agreed to the bout, though the individual fighters' camps did not immediately return messages requesting comment.

Although initially reported as taking place at UFC on Versus 2 on Aug. 1, MMAjunkie.com has since learned the fight could take place later in the year, possibly in September as part of a UFC Fight Night or pay-per-view event.

While many look at champ Frankie Edgar and contenders B.J. Penn, Kenny Florian and Gray Maynard as the elite of the UFC's 155-pound class, Miller is nipping at their heels. The former IFL lightweight champion has won 12 of his past 13 fights, and during his current streak, he's topped Mac Danzig, Steve Lopez, Duane "Bang" Ludwig and Mark Bocek.

Miller's only career losses have come to Edgar (at a 2006 Reality Fighting show) and Maynard (at UFC 96). Both losses came via decision.

Like Miller, Tibau is also closing in on a potential title shot. After back-to-back losses to Tyson Griffin and Joe Stevenson in 2008, the American Top Team fighter has won four of five fights, which includes recent back-to-back victories over Josh Neer (decision) and Caol Uno (TKO). The lone loss came to Melvin Guillard in a close split-decision loss that MMAjunkie.com scored in Tibau's favor.

Miller (wrestling) and Tibau (Brazilian jiu-jitsu) are both well-rounded fighters with strong ground games. Of their combined 38 career wins, half (19) have come via submission.