People shouldn't get too hung up on language, especially off-the-cuff comments from sportspersons who are not always the best with words.
Very good advice. IMO, it's best to keep an open mind about possible interpretations, especially when the full context is often unknown. We know this is from Andy's column, so we can be fairly confident he said it, which is not always the case, but he doesn't sit down and transcribe the whole thing. He gets asked questions and answers them. He may have been asked "are you scared about the possibility of meeting Nadal in the QFs?", to which he answered "no". And so on.
The reality it, the only sensible way to answer that sort of question is to say he's not scared. It's very true that you have to be prepared to face top players, and Andy is the person who went to Spain because the competition in Scotland wasn't enough to satisfy him, so it's more than plausible that he is really excited at the thought of playing Rafa again. However, it's also fair to say that it's professional suicide to admit to being scared of playing a certain opponent. He'd be heavily criticised for being defeatist, and rightly so.
I get anxious when Andy's opponents get to 30 on his serve, but fortunately Andy is much cooler under pressure than me, and seems to thrive on it, and for the top players, I suspect it's a big part of what drives them. I'd also argue that Rafa will be slightly easier to beat in a quarter final than in a semi or actual final, as the courts are faster and less suited to him earlier in the competition.