Even though Roger said he didnt feel any of the stomach symptoms he had,it's pretty obvious that he's not in a great form...tonight he'll have an easier job style-wise with Blake but then he'll face probably Nole who's playing very well at the moment.
BTW i watched Nadal againt Jarko last night and if a more composed,confident player was against him he would've lost...so really it's a toss up,no one is playing amazingly and everyone can beat everyone...but as a Roger fan i'll go with him.