Middleweight champion Robert Whittaker (20-4) will face interim titleholder Israel Adesanya (17-0) in Saturday's main event of UFC 243, and at least one top-level MMA coach said it could be "one of the greatest fights we've seen."

As of Thursday morning, Caesars Sportsbook has Adesanya as a slight -125 favorite and Whittaker at -105.

Both men are coming off spectacular outings. Adesanya won the interim title by beating Kelvin Gastelum at UFC 236 in April in what was one of the most exciting UFC fights in years. Whittaker has not fought since defeating Yoel Romero in a grueling battle at UFC 225 in June 2018.

ESPN spoke to some of the top coaches in the sport to break down one of the UFC's best 185-pound fights ever.