If ur frnd is a gud playr then he can make him do his studies well till he crosses 12th or 10th standrd till that period he have to make a propr balance between his studies and sports too..
If he is a part of district level i guess he should focus on going to national level.. and if he goes to national level i dont guess his parents and teachers will be unhappy?? and if his parents say that he should just study then that depends on his mind what he wants to doo...