Fans looking to live stream Joshua v Povetkin for free tonight could be in for a nasty shock.
The fight is expected to be one of the biggest bouts of the year with millions tuning in across the world.
But those hoping to watch without paying for the fight through official channels could face a disappointing night.
With rights holders trying to protect their content many are opting for legal blocks and bans to be put in place.
These have been hugely successful with Premier League and UEFA football streams being instantly stopped the moment they appear online.
Now boxing is getting the same treatment with Mr Justice Arnold awarding Matchroom Sport Limited and Matchroom Boxing Limited a blocking order that will require UK Internet Service Providers to block, in real time, servers that are hosting illegal live streams of its boxing events.
This could make it incredibly hard to watch the Joshua v Povetkin without paying.
The Order will take effect in time for the Anthony Joshua v Alexander Povetkin world title fight on Saturday night, and will be in place for an initial period of two years.
Speaking about the ban, Steve Dawson, Group CEO Matchroom Sport: “This blocking order is a game-changer in our efforts to tackle piracy of our PPV and non PPV boxing events.
“It will allow us to quickly and effectively block and disrupt illegal broadcasts of our shows.
“The protection of the copyright in broadcasts of our events is hugely important to us and we are pleased that the Court has recognised this with the granting of this blocking Order.”
And Matthew Hibbert, Head of Litigation at Sky, added: “We’ve seen how effective the Premier League blocking order has been in disrupting pirated streams of matches.
“The blocking order awarded to Matchroom will make illegal streams of boxing harder to find and less reliable to watch.
“People who try to stream Saturday’s fight illegally on social media, pirate sites or so called ‘Kodi boxes’ risk missing all the action and exposing themselves to harm.”
Fans are also being warned about the dangers of live streaming the fight on social media channels such as Twitter or Facebook.
In the past year, there have been a number of high profile cases where fans have been caught and fined for posting content online.
Last year Yusuf Mohammed of Bristol was ordered to pay legal costs of over £16,000 and to disclose details about the money he made and people he colluded with for re-streaming Sky Sports content online illegally.
As well as the costs, Mr Mohammed had to pay Sky damages.
Another person was also ordered to pay substantial legal costs for sharing the Joshua vs Klitschko fight on Facebook.
Thousands of people enjoyed the boxing match via a live stream for free which was viewed by some 4,250 people at its peak.
This was eventually traced back to the Sky account holder, Craig Foster, of Scarborough.
He says one of his friends live streamed the fight using an iPad, which was already logged into his Facebook account.
He has agreed to pay £5,000 in legal costs to Sky.
Neil Parkes of law firm Foot Anstey said: “Fans need to be aware of the illegalities of streaming. Despite the excitement surround the fight, those wanting to stream the fight must be aware that it is illegal to share a stream of the fight, even if you have paid to watch it.
“Many of those who have illegally shared previous fights on social media have been subject to legal action and been required to pay thousands of pounds in legal costs – don’t become one of them”.