This greatly expanded profile of Rafael Nadal adds a biography and career history to a concise presentation of basic facts, playing style, greatest strengths, and areas needing improvement

Each correct answer brings a new question of higher difficulty. See how far you can get.

This step-by-step, photo-based lesson will help you learn the most popular forehand among power hitters. Because it encourages topspin, this stroke can also improve consistency.

This greatly expanded profile of Roger Federer now includes a biography and career history. Basic facts about Roger and an analysis of his greatest strengths and weaknesses have also been updated.

Photos illustrate this step-by-step lesson on how to hit the one-handed backhand topspin lob. This shot is relatively difficult to execute, but it's usually a clean winner once it clears an opponent at the net, and it's handy in baseline rallies, too.

Contrary to a popular misconception, all serves should not be met at the same point of contact. Photos illustrate this tour of the ideal points of contact for the four most common spin serves and one exotic one.

If you're thinking about buying some new tennis gear soon, here's a fun way to test your knowledge of a few basics concerning racquets, strings, and balls. This quiz uses a game-show format and explains each answer.

Improve your mental and physical service return techniques. Answers include universal techniques for all returns and specific adjustments for returning hard, kick, and slice serves

Servers at the beginning and intermediate levels should find this step-by-step lesson helpful either to learn the serve for the first time or to improve technique on an existing serve. This is essentially the same stroke as an advanced serve, but without intentional spin.

Victoria Azarenka is one of the hardest hitters and most promising young players on the women's tour. Here, in outstanding photos, is how she delivers all of that power.