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Before this trip, I'd interviewed Roger Federer dozens of times, but on this trip, in planes, locker rooms and hotel suites, and through police motorcades, my understanding of Roger Federer was almost completely recast, the reach of Roger Federer fame, the reserves of Roger Federer energy, the connection Roger Federer has with fans — all were unlike anything I'd ever witnessed. More than once, fans wept seeing Roger Federer.