Vaughn Ridley/Getty Images While we waited years for the last great boxing match, Mayweather-Pacquiao, the latest big fight between Floyd Mayweather and Conor McGregor came together much faster and the fight itself is already here. On Saturday — or in some cases, Sunday — people all over the world will be tuning in to see what happens when a top MMA fighter takes on a top boxer and to see if the biggest name in combat sports, McGregor, can pull off the monumental upset over the greatest boxer of the last 20 years. OK, well most people will be tuning in just to see the pomp and circumstance of a huge event that will include countless celebrities in the crowd and the glitz and glamour of a huge Las Vegas event. But with McGregor likely retiring after the fight and McGregor returning to UFC, this could be the last boxing match for a while that truly transcends the sport. How to watch it There are various ways to legally watch the fight, but it won't be cheap. On television Showtime In the United States, the fight is being broadcast by Showtime Pay-Per-View.