UFC on ESPN: Gane vs. Spivak (also known as UFC on ESPN+ 84) is a mixed martial arts event produced by the Ultimate Fighting Championship on September 2, 2023, at the Accor Arena in Paris, France. The event marks the promotion's second visit to France and first since the country's much anticipated debut at UFC Fight Night: Gane vs. Tuivasa in September 2022.

• Ultimate Fighting Championship
• Ciryl Gane
• Sergey Spivak
• Manon Fiorot
• Rose Namajunas
• Benoît Saint-Denis
• Thiago Moises
• Volkan Oezdemir
• Bogdan Guskov