Quote:
|
Originally Posted by Bifta
Quote:
|
Originally Posted by skunk4u
13 ) every 2 sets
|
Wrong
__________________
Quote:
|
Originally Posted by ian@huth
13. after seven games.
|
Close, but not the full answer |
It's probably after seven games or a certain time interval as decent tennis balls get softer after being taken from their pressurized container even if not used. Would have to google to check.