Tennis guides
The parts of tennis that take a paragraph to explain, kept in one place instead of repeated on every tournament page.
Why these four
Tennis assumes you already know things it never explains. Commentators say a player is defending points without saying what that means. A draw sheet arrives with numbers beside some names and nothing beside others. Someone calls a court slow, and the scoreline that follows makes no sense unless you know what slow does to a rally.
None of it is complicated, but nobody writes it down in one place, because the people who cover tennis assume the audience learned it years ago. These four pages are the parts that come up most often when you watch a tournament and something happens that the coverage does not bother to explain.
Read the surfaces page first if you are choosing what to watch: it changes how long a match runs and which players are worth your evening. Read the draws page before a Grand Slam starts, when the bracket is published and everyone starts arguing about who got the easy quarter. Read the points page in the week after a major, when the rankings move in ways that look arbitrary and are not.
The viewing guide is a different sort of page. It answers the question this whole site exists for: the match is on, and you cannot find it.