This fight won't mean much in the grand scheme of things, but these two talk smack among the best of them. Both fighters are coming off losses, and the loser of this one is probably sent packing. Especially if it's Frank Trigg.
Frank Trigg comes into this fight after getting destroyed by Josh Koscheck at UFC 103 in the first round. He's (19-7) in his career and had won four fights in a row going into the Koscheck, albeit against mediocre competition. Trigg has solid wrestling and good ground and pound while enjoying a sizable reach advantage in this fight.
Matt Serra comes into this fight after a close decision loss against Matt Hughes at UFC 98 last year. So it'll be a pretty lengthy layoff for "The Terror". He comes into this fight with a career record of (9-6). Serra is a BJJ blackbelt and is pretty difficult to finish and has 4 submission wins to his credit.
This fight basically comes down to the heavy hands/ground game of Matt Serra against the take downs and ground and pound of Frank Trigg. I think these guys will stand a trade a bit , but the fight will eventually go to the ground. Although Serra is a BJJ blackbelt, I'm sure he doesn't want to be on his back underneath the ground and pound of Trigg. Serra did a decent job against Matt Hughes and his take downs so he may be able to keep this fight on the feet more than most people think. However, if Serra somehow gets top position, that wouldn't bode well for Trigg. Trigg is vulnerable to submissions(in particular the RNC) so don't forget that little nugget of information as Trigg could take some shots and give up his back. The long layoff could be a factor for Serra, but he's a gamer and incredibly difficult to finish. All in all this fight will probably go to the judges with whomever having top position on the ground achieving the victory.