UFC 231: Holloway vs. Ortega was a mixed martial arts event produced by the Ultimate Fighting Championship held on December 8, 2018 at Scotiabank Arena in Toronto, Ontario, Canada. A UFC Featherweight Championship bout between Max Holloway and Brian Ortega served as the event headliner.

• Zuffa
• Max Holloway
• Brian Ortega
• Valentina Shevchenko
• Joanna Jędrzejczyk
• Gunnar Nelson
• Alex Oliveira
• Hakeem Dawodu
• Kyle Bochniak