Paris (SF): Federer to play Tsonga in finals of Bercy
When you watch a match like Federer vs. Berdych, today's semifinals, you see how each player works the strengths and weaknesses of the other player. Let's start with Berdych. Berdych has a pretty big serve, but his strength is his forehand. He hits one of the hardest, yet most effortless forehands. He can hit it