What to watch: nightswimming

8:00 p.m. ET, NBC, Swimming and Beach Volleyball: Michael Phelps starts his quest for gold, and if we're lucky, he will show off the Chinese he has learned using Rosetta Stone. Dara Torres and Katie Hoff also go for gold tonight, and Kerri Walsh and Misty May-Treanor start pool play at the beach.

12:00 a.m. ET, CNBC, Tennis: American James Blake and Australia's Chris Guccione start the road to gold ... where they will inevitably be stopped by Federer and Nadal. Still, go James!

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