His serve is probably the biggest weapon in tennis, ... You can't teach being 6-foot-10. It's like he's serving out of a tree. Just the angles that he's able to create, he makes you hit his serves over your head where you're normally hitting them from around your hip.
I haven't had an amazing serving day against him, ... I've played well against Roger from the baseline before, but I haven't had that monster serving day. That's what I'm looking for.
I can still play better. I'm playing a lot calmer now. I'm not worried about trying to win every point or win the match in every point. I'm kind of just staying a little bit even keel, and I'm serving 10 times better than I have been this year, which is a big, big plus for me.