Neil Magny vs Kelvin Gastelum full fight video preview for UFC Fight Night 78 main event

Ultimate Fighting Championship (UFC) returns to FOX Sports 1 later tonight (Sat., Nov. 21, 2015) with UFC Fight Night 78 from inside Monterrey Arena in Monterrey, Nuevo Leon, Mexico, featuring a main event between welterweight standouts Neil Magny and Kelvin Gastelum.

Time to separate the contender from the pretender.

Magny (16-4) stepped up on short notice to fill in for the injured Matt Brown. The 28-year-old welterweight competed twice this past August, splitting a pair of fights between Demian Maia and Erick Silva. Gastelum (11-1), meanwhile, is 5-1 since winning The Ultimate Fighter (TUF) 17 with his only loss coming to Tyron Woodley at UFC 183 last January.

Here's a closer look at each fighter, starting with Neil Magny:

And of course, Kelvin Gastelum:

Good stuff.

MMAmania.com will provide LIVE round-by-round, blow-by-blow coverage of the entire UFC Fight Night 78 fight card TONIGHT (click here), starting with the UFC Fight Pass "Prelims" bouts at 6:30 p.m. ET before moving on to the FOX Sports 1 "Prelims" offering at 8 p.m. ET, followed by the FOX Sports 1 main card line up at 10 p.m. ET.

To see who else is fighting at UFC Fight Night 78 check out the entire "Magny vs. Gastelum" fight card and line up by clicking here.