It's hard to say if the soreness was due to the lateral movements of playing football, or rather due to all the other aspects - the explosive first step, jumping, constantly starting and decelerating, etc. When you want to compare it to regular sprinting or running, obviously you have quite a few variables at play.
That being said, to answer your question, I'd say that you should work through the various planes of movement through your program. That would include lateral stuff (you can work with speed ladders), sprinting and quickly decelerating, backpedeling followed by sprints (same direction or opposite direction), etc. There are many possibilities. Dont be afraid to add different things to your workouts if you think they'll benefit you.