Oleksandr Usyk vs. Chazz Witherspoon live stream: How to watch on DAZN

Oleksandr Usyk tore through the cruiserweight division, leaving an eighth-round knockout of Tony Bellew last November as his final impression there.

Now, Usyk tests his punching power and overall boxing ability on the next level up, as he makes his heavyweight debut Saturday night against Chazz Witherspoon at the Wintrust Arena in Chicago, live on DAZN.

The former undisputed cruiserweight champion brings a spotless 16-0 record, including 12 KOs, against Witherspoon, who is a late replacement after Tyrone Spong tested positive for a banned substance.

Will Usyk set off some fireworks in his heavyweight debut and immediately put the division on notice, or will Witherspoon let the Ukrainian know that he's not ready for this move just yet?

Here’s all the information you need to watch Usyk vs. Witherspoon, including how to live stream the fight online with a DAZN subscription.

Oleksandr Usyk vs. Chazz Witherspoon live stream

The Oleksandr Usyk vs. Chazz Witherspoon fight is not available via traditional pay-per-view methods. Instead, fans in the United States can watch the fight on DAZN, the global live-sports streaming service home to Canelo Alvarez, Anthony Joshua, Gennadiy Golovkin and more of boxing's top fighters.

DAZN is available on a variety of platforms, including Roku, Apple TV, Google Chromecast, iOS, Android, Xbox One, Playstation 4 and Playstation 3, as well as Chrome, Firefox, Internet Explorer and Safari browsers via DAZN.com.

New for this fight season, Comcast customers can sign up for DAZN on Xfinity Flex.

What time does the Usyk fight start?

• 7 p.m. ET (prelim) | 9 p.m. (main card)

The main card on Saturday, Oct. 12, kicks off at 9 p.m. ET, so expect Usyk and Witherspoon to make their ring walks about 11 p.m. ET, although the exact time depends on the length of the earlier bouts.

How much does DAZN cost?

• 1 month DAZN subscription: $19.99
• 1 year DAZN subscription: $99.99

Current DAZN subscribers already have access to the fight. New subscribers can pay either $19.99 per month or $99.99 per year for the service.

What other fights are on DAZN?

In addition to Usyk vs. Witherspoon, DAZN also is the exclusive home to boxing superstars  Canelo Alvarez, and former heavyweight champion Anthony Joshua.

DAZN's fall fight schedule includes Alvarez's next fight Nov. 2, when he moves up two weight classes to challenge Sergey Kovalev for the WBO light heavyweight title belt in attempt to become a four-division world champion. A non-traditional duel between YouTubers KSI and Logan Paul follows on Nov. 9, and the highly-anticipated unified heavyweight title rematch between Andy Ruiz Jr. and Joshua will take place on Dec. 7.

DAZN also carries Matchroom Boxing cards and live-streams mixed martial arts (MMA), offering over 100 fight nights per year between Bellator MMA, Combate Americas and World Boxing Super Series.

Where can I stream DAZN online?

DAZN can be live-streamed via smartphone, computers/laptops, tablets, smart TVs, set-top boxes and video game consoles. Here is a list of DAZN-supported devices: