The women's strawweight division could be set for a shake-up this weekend as two highly ranked contenders do battle in an intriguing main event.

Jiu-jitsu maestro Mackenzie Dern will be looking to solidify her status in the top five and begin making a case for the next crack at UFC gold when she takes on the number six ranked Xiaonan Yan.

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And there's an entertaining battle between two welterweight contenders who always come to fight as Randy Brown faces Francisco Trinaldo in the co-main event from the UFC APEX.

There's something unusual afoot at the UFC's competitive HQ this weekend with the event being closed off entirely to both the media and the general public for reasons yet to be made clear.

In her pre-fight press conference this week, Dern suggested she'd heard Facebook supremo Mark Zuckerberg had something to do with it - although that was later denied by UFC boss Dana White.

Tune in on Saturday night to find out just what is going on at the UFC APEX when UFC Fight Night: Dern vs Yan gets underway, exclusively live on BT Sport.

What time is UFC Fight Night: Dern vs Yan?

The event will be shown exclusively live at 10pm (12am main card) on Saturday 1 October on BT Sport 1HD and across our digital platforms.

UFC Fight Night: Dern vs Yan Fight Card

Mackenzie Dern vs Xiaonan Yan - Women's strawweight

Randy Brown vs Francisco Trinaldo - Welterweight

Raoni Barcelos vs Trevin Jones - Bantamweight

Sodiq Yusuff vs Don Shainis - Featherweight

John Castaneda vs Daniel Santos - Catchweight

Mike Davis vs Vlacheslav Borschev - Lightweight

UFC Fight Night: Dern vs Yan prelims

Ilir Latifi vs Aleksei Oleinik - Heavyweight

Jessica Penne vs Tabatha Ricci - Women's strawweight

Joaquim Silva vs Jesse Rondon - Lightweight

Krzystof Jotko vs Brendan Allen - Middleweight

Maxim Grishin vs Philipe Lins - Light heavyweight

What if I can't watch UFC Fight Night: Dern vs Yan live?

No problem! Our brilliant enhanced video player is available on both the BT Sport app on mobile and tablet and BTSport.com.

You won't miss miss a second of the action thanks to our interactive timeline, which lets you control your own viewing experience by allowing you to scroll back through the entire card - or skip to your preferred fight using our 'chapters' feature.

And most importantly, the entire card will remain available to watch spoiler-free immediately after broadcast - as it will on our large screen device app. Bookmark this page and return at your leisure to tune in from the outset.

You can also watch a replay of the fight card on BT Sport on Sunday night. Check the TV Guide for more information.

How to live stream UFC Fight Night: Dern vs Yan on a phone or tablet

Subscribers wanting to watch the fights can open the BT Sport app on Saturday night and follow the link at the top of the homepage.

The app is available to download for free on iOS and Android phones and tablets.

How to live stream UFC Fight Night: Dern vs Yan on a laptop

Follow this UFC Fight Night: Dern vs Yan or access via bt.com/sport when our coverage gets underway.

How to watch UFC Fight Night: Dern vs Yan on TV

If you prefer watching all the action on the big screen, just head to BT Sport 1HD in time for the beginning of the event. BT TV customers can find us on channel 430, while Sky customers can head to channel 413 and Virgin Media viewers to channel 527.

*BT Sport customers can download the BT Sport app on PS5, Xbox Series X, Apple TV, NOW and many more devices.

Make your device's home page spoiler-free!

Our award-winning app on mobile and tablets allows you to customise your home page to avoid seeing spoilers the morning after the big fights.

To make the switch to a spoiler-free home page, open up the app and click 'More' in the bottom corner.

Under 'Settings' change the 'Landing page' option from 'Home' to 'Spoiler-free replays'.

You will then need to exit and close your app. Once you reload the app, your home page will default to the 'Spoiler-free' tab in the Sports navigation menu.

Once you're done in spoiler-free mode, you can either revert your home page back to the default option - or simply navigate away from the spoiler-free tab and check out some of our other must-see content across the app.