Querrey, Del Potro stand out in Davis Cup
You could call this a tale of two rookies -- one of whom had a good weekend, while the other one had a great weekend. I'm talking about Sam Querrey of the U.S. and Juan Martin Del Potro of Argentina, respectively. If you want to get all technical about it, Del Potro isn't exactly a rookie -- he played two ties in 2007. But he's still a newcomer and potential force for the blue-and-white -- the best nation never to win the Davis Cup.
Querrey lost both of his singles matches this weekend ...
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