I've been playing for around a year and just signed up for my first singles tournament. I've played mostly doubles. What are the basic strategies in singles? I'm not looking so much for things like serve outwide, hit return cross court, but more basic things like positioning. For instance, if I'm a the baseline and my opponent moves to the right side of the court I move left, correct? I'm basically looking for the little tips that come from playing singles for awhile.