They could be soft by then. They should also have a comparable weight because you don't want to be on the ground under by a soft 200 kg man or robot or whatever

They could be soft by then. They should also have a comparable weight because you don't want to be on the ground under by a soft 200 kg man or robot or whatever. However they'll win easily if they are made to be stronger and / or faster. Strength: hard for humans to push them around and to steal the ball from and easy for them to do it to humans. Fast: they'll just throw the ball past the defenders and run, like boys vs children. No need to use any soccer skill.