Roddick can challenge him as well if he serves big consistently for the entire match. If he does that, then he is tough to break even for a guy like Federer.
罗迪克也可以挑战他，如果他在整场比赛中都能连续发球。如果他这样做了，对于费德勒这样的人来说，他很难做到收支平衡。
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Tough