Tennis players change ends after every six points during a tie-breaker. Refer to the USTA link, below, for further information.
Players have 90 seconds between normal change of ends and 120 seconds between sets.
when the number of games are odd
No they each have their own towels. That would be pretty gross.
Tennis players rotate around the net every odd game. That is they switch after the 1st game, 3rd game, 5th game, etc. For example, if the score is 1-0 they switch. If the score is 4-3, they switch. If the score is 6-5, they switch. They switch after they've played every off game.
When serving the ball, there must not be any spin when throwing it vertically to serve. It must not be served on the full. Its must go with in the space of the ends of the table, not off to the side of the table. These are the main serving infringements.
Usually the players switch ends after every other game of a match. They begin switching after the first game, so they will change every odd numbered game: 1st, 3rd, 5th, 7th and so on.
A vegetable. It ends in "table."
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Tennis starts when the umpire says and ends when the umpire says and when the sat lady sings
"Game, set, and match" is the term for the final point scored in a tennis match. It's effectively a shorthand for saying "that point ends the game, that game ends the set, and that set ends the match."
Table tennis is played as Best of Five ends, each end being up to eleven points. However the player must win by two clear points so if the match goes to ten all, someone must win 12-10 in order to win( or 13-11 etc)