why can´t I do sport?

   Last Wednesday, I signed up for a tennis tournament of univesity welcome, and I really have a problem with this. I had a talk with the person that runs sport at university, wich name I don´t remember, and he basically told me that I have to settle for can´t play tennis, because most sports' classes are given in the evening, and I have university at that time. I absolutely disagree with the fact that people that have the university in the morning can do 80% more sports than those which have classes in the evening!