How to locking up your opponents?

The easiest and simplest way of beating a player is to "lock him up." This basically means forcing him to do what he doesn't want to do. The classic case is to force a player with a weak backhand to go backhand to backhand. Another example would be take away an opponent's strong loop and force him to instead block by getting the first loop each rally. How do you "lock someone up"? Often, the best bet is to base much of your tactics toward this goal. It often takes a lot of thinking and a lot of work. You've got to figure out what your opponent want to do. Then you have to figure out how, using your own weapons, you can force him to do what he doesn't want to do. Too often players think only about what they want to do, and forget about forcing their opponents to do what they don't want to do.