How do you know when the set in tennis is over?

Answer 1

Depending on what kind of match you're playing, you pick how many games are in a set. A pro set is 8 games. People that play on TV in the US Open or something don't play that kind, though. They just play to 6 games. When you play 6 games, that's a set. However, you have to win by two games. So if the score is 5-6, someone has to score another point. If the person with 5 scores, it's tied 6-6, and they go into tiebreak. That means the opponents have to play to 7 in the match. But, just like the other rules, you must win by two. So you MUST play to 7 in tiebreaks and you MUST win by two.

Sorry for the long explanation :P