Funny thing is Andy players better on quicker courts of Shanghai, than he does on the slower courts of IW and Miami.
Judging by what Andy has said, it's not so much the court speed, but the short run back and the crowd feeling very close that makes him feel uncomfortable, more so than on Ashe.
I have a feeling Andy played Cilic on Armstrong when he knocked Andy out in 2009. I'm not sure about Wawrinka the following year, but in my head Andy wasn't feeling well that day and that contributed to the loss.
I don't fear for Andy so much against Mayer. I also think Andy is playing with confidence. However, I was sure Andy was going to beat Lopez easily last year and look how that went, so we'll see. I must admit though, I'm not anxious at all, so hopefully that's a good sign.