Hi,
Welcome to Health Care Magic, thanks for posting your query. I understand your concern.
Considering that you are outdoors most of the time playing sports, i advise you to use a sunscreen of spf 50 or more before stepping out in the sun. This way you prevent the harsh UV rays from damaging your skin and darkening your complexion.
To get rid of your tanned skin you could try one of the tan removal cream avaliable in markets like Suntan removal cream. You could also try a few
home remedies like tomato juice application, lemon and honey application and so on which will help you get rid of tan in a few weeks time.
Try and avoid going out in the sun for a few days to prevent further damage.
Play basketball in indoor courts .
Hope this helps and answers your query satisfactorily.
Do write back to me if you need further assistance.
Wishing you good health ,
Regards.