UFC 170 Preview: Watch Online Ronda Rousey vs Sara McMann Tonight (Start Time, Full Fight Card)

UFC 170 takes place Saturday night and will feature a main fight of Ronda Rousey vs Sara McMann in what should be an explosive night in the Octagon. Tonight's event will take place from Mandalay Bay Events Center in Las Vegas, Nevada, with UFC Fight Pass Prelims starting at 7 p.m. ET. Fox Sports 1 Prelims will start at 8 p.m. ET, and the Main Card will have a start time of 10 p.m. ET after those fights. A preview, and details on how to watch the event online through live stream can be seen below.

(Photo: Reuters/Mohammed Salem)A view of the Ultimate Fighting Championship (UFC) octagon during the UFC tournament in this file photo.

This will be the first time that two Olympic medalists will be facing off against one another inside the Octagon. Rousey's is the hugely dominant women's bantamweight champ, however, she will be fighting undefeated Sara McMann tonight, who will be looking to pull off a shock in the UFC world.

Tonight's fight will be the second time Rousey has defended her title in just eight weeks, after she defeated Miesha Tate in UFC 168.

McMann is somewhat of an unknown, however, Rousey would do well to treat tonight's fight as seriously as possible, as McMann is an undefeated Olympic silver medalist wrestler. Some might remember how she completely destroyed Sheila Gaff in her debut in UFC 159, and she could be a tougher challenge than Tate provided just over a month ago.

Looking at Ronda Rousey's stats, she is 8-0 overall and 2-0 in UFC. Undoubtedly her patented armbar will be something McMann needs to avoid, however, rumors have suggested that she has been significantly improving her striking and dropping professional boxers with body shots in training. Whether those rumors are just to put some fear in her opponent tonight, or whether she really has improved her striking that drastically remains to be seen, but if true McMann will certainly have to find a way to combat that strength.

Even though Rousey will be looking to try and get McMann in a clinch, her opponent today could be the best equipped to deal with her throws and sweeps. McMann is an expert wrestler, and should have the armory to make Rousey's job that much more difficult tonight.

McMann is 7-0 overall and 1-0 in UFC competition, and will be putting her freestyle wrestling skills up against Rousey's famous judo skills. When she attempts to bring Rousey down to the canvas, she will have to be aware of Rousey's ability to suddenly turns things around and latch on her lethal armbar. McMann will have to ensure she maintains top control and defend against any counter from the champ.

Tonight's UFC action can be watched on UFC PPV, or online through live stream on UFC.tv by clicking here.

Here is tonight's Full Fight Card:

UFC 170 Main Card (10 p.m. ET)

Ronda Rousey vs. Sara McMann
Daniel Cormier vs. Patrick Cummins
Rory MacDonald vs. Demian Maia
Mike Pyle vs. TJ Waldburger
Robert Whittaker vs. Stephen Thompson

Fox Sports 1 Prelims (8 p.m. ET)

Alexis Davis vs. Jessica Eye
Raphael Assuncao vs. Pedro Munhoz
Cody Gibson vs. Aljamain Sterling
Zach Makovsky vs. Josh Sampo

UFC Fight Pass Prelims (7 p.m. ET)

Rafaello Oliveira vs. Erik Koch
Ernest Chavez vs. Yosdenis Cedeno