There are always going to be quicker players out there so you have to use your basetball IQ to cover them. You have to outsmart them and learn their game as you guard them so you can beat them to the spot. Try to look for little things that they do when they make moves so you can be one step ahead.
Here is a playlist of some great defensive drills that you can work on to imrove your defense.
Coach Ryan Tremblay