Sport is big business.  It is a part of our culture around the world whether we live in North American, a small Brazilian village or a remote town in Siberia.  We like to play and play is good for our mind and body.  Some people take sport quite serious.  Some make a living at it.  Some just wish they did.  Some say they coundn't care less about it.  The best of the best recognize that performance in sport is the manifestation of a lot of work, practice, thought, advise, coaching and food.  Food is about nutrition.  It is also about immune function.  Many foods today cause delayed sensitivity immune reactions which result in compromised athletic performance.  The most common are dairy, eggs, wheat and corn.  They affect the mind and body.  Consider getting a blood test for IgG food sensitivities, eliminate those offending foods and notice the improvement in your game.