Khabib really hasn't retired after all. Like all singer, player, actors who declare retirement only to return back the next year.
"Will return if opponents prove themselves..."
https://www.rt.com/sport/512805-ufc257-khabib-calling-shots-mcgregor/
"Will return if opponents prove themselves..."
https://www.rt.com/sport/512805-ufc257-khabib-calling-shots-mcgregor/