A great way to improve your tennis is watching practice videos where you can focus on pro player technique. Since Federer is my favorite, I mostly watch his videos. You can definitely pick up a trick or three in those videos.
Since Nicolas Almagro hits the ball with such power I was curious about how a training session with him would look like. You rarely see people throw their rackets while hitting, but Nicolas sure is a hot-headed guy.
Look how he tries to blast the ball. The guy must be really angry.
And really fun to watch.