(Reuters) -England's Tom Aspinall enters UFC 321 on Saturday as a big favourite to retain the heavyweight title, and if he beats French challenger Ciryl Gane, it will be the first time he exits the cage with the undisputed belt around his waist.

The 32-year-old ascended to the top of the division in unusual circumstances, capturing and defending the interim UFC heavyweight title before being elevated to undisputed champion following American incumbent Jon Jones' abrupt retirement in June.