UFC Fight Night 37 full poster pic for 'Gustafsson vs. Manuwa' on March 8 in London

We're less than a month away.

Top Ultimate Fighting Championship (UFC) light heavyweight contender Alexander Gustafsson will risk his spot in the pecking order against unbeaten up-and-comer Jimi Manuwa in the main event of UFC Fight Night 37, which takes place at the O2 Arena in London, England, on March 8, 2014.

And you can only watch it on "Fight Pass" (details).

It's very ... blue.

A win for Gustafsson (15-2) likely guarantees him a shot at the 205-pound title, which will be contested between Jon Jones and Glover Teixeira at UFC 172 in March. "The Mauler" has been able to keep himself "in the mix" by nearly breaking "Bones" at the UFC 165 pay-per-view (PPV) last September.

But he's got some stiff competition.

Manuwa (14-0) has been flawless to date and a win here -- particularly a finish -- would likely steal the Swede's spot in line, or at least pull him into a tie with Daniel Cormier, who takes on Rashad Evans at UFC 170 later this month in Las Vegas, Nevada.

See the first staredown pic between Gustafsson and Manuwa here.

In addition to the headliner, the next UFC event across the pond will feature a lightweight co-main event pitting veteran striker Melvin Guillard against former Ultimate Fighter (TUF) 12 finalist Michael Johnson, while Brad Pickett battles Ian McCall in flyweight action.

See the entire UFC Fight Night 37 fight card and line up here.