This week's sampling of top tweets include Alison Riske riffing on her first WTA title victory and Roger Federer weighing in on that "free Wi-Fi" sign held aloft in his honor, plus a Yao Ming visit in which Fed truly looks up to the Chinese basketball idol. And lest we forget, a Moscow talk show gives us a rare but glorious Elena Dementieva sighting. She looks downright radiant in her retired life; maybe we should all try that one day.

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