I don't think you can upgrade a Hisense Arena ticket to a RLA. I had a look at the FAQ on the AO website & when it said you cannot upgrade a Ground Pass to a RLA (or something along the lines of that), it maybe the same for Hisense Arena tickets.
But I remember this year I actually tried to get one of my ground passes upgraded for a RLA ticket, could do it but that RLA session was sold out. So I don't understand why they are not allowing RLA upgrades
They might be offering but didnt mention, i cant find an email or phone number to ring and ask anywhere! its annoying cos i just wanted hisense and then if masha or dokic (if she gets in) are playing id just upgrade for that day to RLA
Maria Sharapova + Jelena Dokic + Sabine Lisicki + Vania King + Julia Goerges + Victoria Duval + Sloane Stephens