i heard that i won tickets in the public ballot today for centre court opening day ... very exsited but the problem is that is is the same day as my last A level exam ... i am going to go down after my exam but i wont get there untill about 4pm .. just wondering if anyone could help me out ... has anyone got any ideas on how i can swop these tickets for another day ? or does anyone have any tickets i can swop with ??!!!!