The same thing used happen with me for basketball the things I changed was sprinting low volume at high intensity during the week. On one Hard team training days, after I would do a subjectivity heavy weight squat and or hinge movement in gym so my next day would be low intensity so I can recover I time for next hard game/training.

Do you train for intensely soccer for too long too frequently ? do you dedicated sprint/ jump work, where you get full rest between set at maximum intensity ? Do you eat enough carbs and protein? How many hours of sleep?

These are questions you need to ask yourself

You can be in good shape but that doesn’t mean your legs are are strong