The Ultimate Fight Championship kicks off its 2025 schedule tonight at the UFC Apex in Las Vegas with an event headlined by women strawweight contenders. Sixth ranked Mackenzie Dern (14-5) takes on eighth ranked Amanda Ribas (13-5) in a rematch in the UFC Vegas 101 main event. The two first fought UFC Fight Night 161 in October 2019. Ribas handed Dern her first career loss. Six years removed from their first meeting, both women are different fighters. Start Times: Main card begins at 7 p.m.