Quite a few years ago, I worked a "competitive" MS tourney at a local HS. There were some kids whose dads were in the NBA, mostly with the Trailblazers. We played NF rules with a 5 minute halftime. There was 10 minutes between games.
On Friday night, I worked 3 games. On Saturday, I worked my assigned schedule of 4 morning games and then stayed to work 4 more for a guy who cancelled due to a "last minute" illness. On Sunday morning, I got there to work my 4 and the sponsor asked me to stay and do another 3 including a semi-final and the championship game. Since it was my wife's time of the month and I really didn't want to go home, I said OK.
Fortunately, I was scheduled to go in late to work on Monday so when I got home, I slept about 12 hours. Then I went to the pharmacy to get refills.