I know my opinion won't be popular but if i were Richard,i would try play Vienna,whatever the result tomorrow.
He has some crucial points to defend in Vienna and he probably won't play before Wednesday so he'll have the time to rest.
Yeah it sounds crazy after the schedule he had recently and it might affect his chances for the TMS at Madrid but on the other hand,it's not like he spent a lot of time on the court(still hasn't lose a set!)
I don't think he is not tired. His baseline game wasn't sharp today and I think it was because he is tired.
No don't say he needs to change his fh. Even his backhand sucked today. So I think he might be tired, atleast mentally, although I think he is physically not in any shape to play another consecutive week. He should just go home and come back to Madrid fresher.