Holloway will attempt to become the youngest fighter ever to hold two UFC titles, and only the second to hold both belts simultaneously.
The only other man to do that is Conor McGregor, who has already beaten Holloway previously.
"For the record, [UFC President Dana White] called me yesterday to see if I would step in against Khabib since Max hadn't responded yet", Ortega wrote on Twitter. "April 7 is going to be a great night", he said.
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It's not surprising White didn't ask McGregor to replace Ferguson given The Notorious' status as the most popular fighter in UFC.
The odds for this weekend's lightweight title clash between Khabib Nurmagomedov and Max Holloway have been released and they're very much in favour of the Russian. "I think about maybe [Dustin] Poirier, [Eddie] Alvarez because Poirier fights like next week". Really only one guy was able to do it.
Enter featherweight champion Max Holloway, who was announced as Ferguson's replacement on just six days' notice. Or does this mean he will be bigger than folks expected him to be come fight night? He's a guy I want to make a fight with and have the right amount of time to promote the fight. We now have an wonderful main event between the UFC's featherweight champion Max Holloway and Khabib Nurmagomedov, but we will always wonder what could have been. Nobody wrestled him. But now, he is in different territory, different weight classes, different animals.
The last time the UFC was in Calgary was in 2012 for UFC 149, a card that drew more than $4 million at the box office, but featured a main card that failed to deliver.
"I think Conor could return in September, and it could be against one of these guys".