X-Factor! Some UFC Vegas 25 main card predictions Share this story Per Haljestam-USA TODAY Sports This weekend (Sat., May 1, 2021), Ultimate Fighting Championship (UFC) will return to UFC Apex in Las Vegas, Nevada, for UFC Vegas 25. After a brief jaunt to Jacksonville, Fla., for UFC 261 — one of the most absolutely ridiculous MMA events of all time in my humble opinion — we are heading back to a more standard night of action inside the Apex. Fortunately, that doesn’t mean it won’t be a fun show, as the main event between Dominick Reyes and Jiri Prochazka promises fireworks, and the rest of the card is lots of fun.