Of course, many wondered what would happen to his opponent, Gastelum, who earned this title opportunity after defeating the likes of former champion Michael Bisping and Ronald "Jacare" Souza in back-to-back fights. The issue is not believed to be related to his weight cut.
This marks the second time that Whittaker has been slated to fight in Australia, but been unable to compete because of complications.
Silva was guaranteed a title shot by White if he defeats Adesanya at UFC 234 at Rod Laver Arena in Melbourne this weekend. Adesanaya vs. Silva will remain a three-round contest.