UFC Fight Night 61 Edson Barboza vs. Michael Johnson full fight video preview

Ultimate Fighting Championship (UFC) is going to find out who is the contender -- and who is the pretender -- in the lightweight co-main event for tonight's (Sun., Feb. 22, 2015) UFC Fight Night 61: "Bigfoot vs. Mir" mixed martial arts (MMA) event on FOX Sports 1, going down inside Gigantinho Gymnasium in Porto Alegre, Rio Grande do Sul, Brazil.

That's where No. 6-ranked Edson Barboza will battle No. 12-ranked Michael Johnson for a spot in the crowded 155-pound title chase.

Barboza (15-2) has 10 knockout/technical knockout finishes in 15 total wins, but the Brazilian has a tendency to stumble whenever he gets close to the promised land. That's not unlike his hard-hitting opponent, as Johnson (15-8) has struggled to stay consistent since "The Menace" graduated The Ultimate Fighter (TUF) 12 back in 2010.

But when these guys are on, they're positively electric (proof).

Below, the UFC experts -- including guest analyst (and UFC bantamweight champion) TJ Dillashaw -- break down tonight's 155-pound showdown:

There can only be one (unless it's a draw).

MMAmania.com will provide LIVE round-by-round, blow-by-blow coverage of the entire UFC Fight Night 61 fight card TONIGHT (Sun., Feb. 22, 2015) RIGHT HERE, starting with the Fight Pass "Prelims" matches online, which are scheduled to begin at 5 p.m. ET, right on through the FOX Sports 1-televised prelims and main card, slated to begin at 6 and 8 p.m. ET, respectively.

For much more on tonight's UFC Fight Night 61: "Bigfoot vs. Mir" extravaganza on FOX Sports 1 click here.