It happens usually with many people if you are not a regular player on ground. Here you need to check do you have any breathing difficulty along with this pain?. Do you get this kind of chest pain with any strenuous activity or running as well walking for long or few steps.? Here if your answer is yes then I can say this could be related to your heart and you need to go for electrocardiogram, tredmile test to get it evaluated and consult a doctor. But if you say this was the 1st time and you never had any pain in chest even with strenuous activity then relax don t worry it s just a pain because you have played a lot and all body muscles are tired. In medical language we say there will be micro bleeding in muscles as well muscle soreness due to over use. But this gets all right on its own once you give some stretches and relaxes your muscles. You can also use cold and hot pack on your muscles pain area. I hope you have got the idea and take steps accordingly. Take care.