Rule

A.A.U. Four-Wall Hardball Rules · American four-wall hardball (1930s-40s)

Rule 26

Historical rulebook: not the current rules. The current rules are here (USHA Four-Wall Rulebook, as of 26 January 2025).

In doubles it is customary to serve to the adversaries alternately, but this is not compulsory.

Mentioned here

How these ideas connect in this rule

No link to the other terms shown: Serve, Doubles.