There is a lot you can learn by watching Roger Federer. He has every shot in the book and uses a wide variety of shots to beat players. He is living proof that even with the changes in the game over the last 30 years, the classic all-around game that combines solid groundstrokes with the ability to come to the net is still the best way to win.

Also, his use of the backhand slice is unique in today's game. His ability to change the pace and keep the ball low gives him an edge on his opponents. One of the things that are overlooked -- because of his great shot-making ability -- is his movement and court coverage. Federer is moving effortlessly and covers the court like a tiger. This allows him to get back into points from defensive situations.

But the most important thing that distinguishes Federer from other players is his mental ability, his calmness and focus under pressure, his composure and self control.