for each match they give the match 500 balls in the huge buckets
In professional matches, Line judges are used as well as a official umpire.
Yes, shirts would be washed after matches so that they can be used again.
The Alactic energy systems are primarily used in tennis, about 70% of a tennis match, the performer will be using PCr system. So the answer is yes, as ATP/PCr system falls under the Alactic category.
About 50,000 tennis balls in total. Matches (at least in the ATP) change balls after the 7th game of the match, then every 9 games after that.
Tennis balls are changed during a match because when the can is opened the balls start losing pressure immediatly, reducing the bounce with each shot. This difference is not dramatic as tennis balls can be used over and over but professionals change balls so that they can get the most power and spin from their shots.
Apparently, British soldiers used a rounded cork, and a makeshift net with a table, and a box if cigars (as paddles) to start the very first match of table tennis.
tennis racket and tennis ball
A tennis court varies in width depending on whether it is used for a doubles or a singles match. The width for singles matches is 27 feet (8.23m). For doubles matches it is 36 feet (10.98m).
They get thrown away or given to a family member if wanted.
Most are used as practice balls. Some are refurbished to replace damaged balls.
to play tennis