On Saturday night 80,000 people will be in attendance at Cardiff's Principality Stadium as Anthony Joshua takes on Joseph Parker but for some of the millions watching at home there's a warning from the police.
There's nothing like that big fight feel and Saturday night promises just that. This might not be as massive as the Wladimir Klitschko fight for the undefeated AJ but it's no doubt his second biggest fight.
He faces fellow undefeated heavyweight Joseph Parker. Should either man end victorious then he would hold four of the five major versions of the heavyweight title and an eventual fight with the holder of the fifth, Deontay Wilder, with the WBC belt also on the line becomes almost inevitable.
Check out our interview with Anthony Joshua:
Joshua has reignited interest in the heavyweight division in this country and worldwide and his fights are now must see events. Which is why it annoys people that they have to pay £24 to watch everyone on Sky Sports Box Office, on top of the subscriptions they already pay.
So it's no wonder that people turn to live streams, no matter the fact they're illegal, but the police have warned against it with Detective Inspector of the City of London's Police Intellectual Property Crime Unit Nick Court, saying:
"The Joshua fight is just one in numerous high profile sporting events each year, but don't let your eagerness to tune in make you commit a crime.
"By using illegal streaming sites you can open yourself up to several risks; some set-top boxes do not go through rigorous electrical testing and are therefore at risk of catching fire or giving electric shocks.
"By using legitimate providers these risks can easily be avoided. Watch it live, watch it legally."
You'd have thought his main concern with people streaming the fight is that streaming is illegal rather than the fact your dodgy box might not have gone through the proper electrical checks.
Back in January one fight fan was billed £85,000 by Sky after his friend streamed the fight between Joshua and Klitschko. Craig Foster invited some friends round to watch and one of them streamed the fight from his iPod onto Facebook.
With up to 4250 viewers on the illegal stream Sky hunted down the man whose Sky account the stream came from, cancelled his account and billed him for everyone's £20 they missed out on.
If that's not a reason not to stream nothing is. £24 is a lot cheaper than £85,000 if you weren't sure...