Watch UFC 165: 'Jones vs Gustafsson' 'Prelims' fights online | Live free stream video

Ultimate Fighting Championship (UFC) returns to pay-per-view (PPV) TONIGHT (Sept. 21, 2013) with UFC 165 live from Air Canada Centre in Toronto, Ontario, Canada.

Jon Jones hopes to defend his UFC Light Heavyweight belt against Alexander Gustafsson in the UFC 165 main event, while a Bantamweight title bout between Renan Barao and Eddie Wineland promises to deliver fireworks in the co-featured fight of the night.

But, the mixed martial arts (MMA) action kicks off on Facebook and UFC.com at around 6 p.m. ET with four competitive "Prelims" under card matches that feature some of the best young talent in the promotion. And you can watch those bouts right here MMAmania.com in the video player above.

Here is the UFC 165 "Prelims" card on Facebook.com / YouTube.com:

155 lbs.: Renee Forte vs. John Makdessi -- Makdessi wins via TKO (punches) 2:00 rd 1
155 lbs.: Jesse Ronson vs. Michel Prazeres -- Prazeres wins via Split Decision (29-28 x3, 28-29)
135 lbs.: Alex Caceres vs. Roland Delorme -- Caceres wins via Split Decision (29-28 x3, 28-29)
265 lbs.: Nandor Guelmino vs. Daniel Omielanczuk -- Omielanczuk wins via KO (punch) 3:18 rd 3

Once the Facebook / YouTube.com "Prelims" stream ends, the acton continues on FOX Sports 1 (formerly SPEED) at 8 p.m. ET before than main card on PPV begins at 10 p.m. ET.

Remember, too, that our round-by-round UFC 165 results of the under card fights on Facebook/FX will begin to flow around 6 p.m. ET later this evening and run right on through to our main card PPV coverage, which is set to start at 10 p.m. ET.