A free live stream of Golovkin GGG versus Canelo Alvarez will be all over the Internet Saturday night, it will just be difficult to find until the minutes leading up to the fight.
Due to piracy laws and with all the money at stake for big fight PPVs, it is becoming increasingly difficult to get a reliable link.
The issue big fight promoters are running into though are with Facebook Live, Periscope and YouTube Live. It's near impossible to shutdown any portion of Facebook unless Facebook does it themselves and there are last minute links that will pop up on YouTube live.
Your best bet to watch the McGregor - Mayweather fight free on Saturday night is to go to a YouTube Live page that promises to stream the fight. The fight likely won't be on there but a good trick is to look in the Live Chat section. People will be posting their own links to live streams of the fight. Same deal for Facebook Live.
You can also take your computer virus chances with this: http://fight-live.com/live/boxe-live-stream-1/channel-1/