There is no way USTA would do this for regular league tennis lol.
People can barely handle the two full sets + one 10 point tie break, possibly twice a day, up to 3 days in a row. Some people cant even handle two full sets, once in a day, and one day per week.
Best of 5 sets?
Save it for Majors and finals of the main draws lol.
"In the 1980's two men dominated--sometimes each other, most of the time everyone else."