When fight week hits, sleep takes a hit. Fighters often hit the sack around 4...

https://varimail.com/articles/what-does-a-schedule-built-to-destroy-sleep-look-like-in-fight-week/

When fight week hits, sleep takes a hit. Fighters often hit the sack around 4 or 5 am and wake up between 2 and 4 am, juggling nerves and routines