I think academic subjects and sports world are incomparable to each other as both of them are important in their own right. While academic subjects or academic learning educates you theoretically, sports do the same in a practical manner.
Sports helps you keep your physical and mental health stable . Studies increases your intellect! You can consider pv sindhu's example she is a sports person and now she is a district collector and yes she completed her studies alongside sports. In India where formal education is more important I would suggest you to keep a moderate balance between the both. Yes sports can make your carrier but success rates are one in millions for those with no educational background. Both are equally important.
It is unfair to sacrifice sports classes for academics. Several times towards the end of term or nearing the examination teachers ‘borrow’ the weekly sports classes in order to complete portions, and for revision. This is unfair on the students. They are under pressure of the examination; it is wrong to deny them a little time for sports. In most schools, sports and games are only an hour or two each week. Teachers ought not to use these classes for their subjects.