Every single player can become faster than they currently are (with the correct training). So if you've got a teammate who's naturally quick, but not coupling this gift with extra training, you could soon find yourself beating them to the ball and overtaking them thanks to the work you're doing behind the scenes.
Training to become more explosive and to become more efficient at jumping, turning, changing direction, cutting, accelerating, decelerating and moving in multiple directions will have a significant impact on your performance.