Fight week sleep is a struggle. Fighters often hit the sack around 4 or 5 am...

https://www.fightful.com/boxing/fight-week-the-sleep-problem-nobody-talks-about/

Fight week sleep is a struggle. Fighters often hit the sack around 4 or 5 am after late-night prep and wake up at 2 or 4 am, leaving their bodies running on empty