UFC 75: Champion vs. Champion was a mixed martial arts (MMA) event held by the Ultimate Fighting Championship (UFC). The event was held September 8, 2007 at The O2 in London, England. The main event was a title unification match between UFC Light Heavyweight Champion Quinton Jackson and PRIDE Fighting Championships' 83 kg and 93 kg champion, Dan Henderson.

• Quinton 'Rampage' Jackson
• Dan Henderson
• Michael Bisping
• Matt Hamill
• Cheick Kongo
• Mirko Filipović
• Marcus Davis
• Paul Taylor