(NEWSER) - American teenager Melanie Oudin continued her rampage through the US Open this afternoon, again dropping the first set en route to upsetting a seeded Russian in a 1-6, 7-6 (2), 6-3 victory over No. 13 Nadia Petrova. The 70th-ranked 17-year-old, buoyed by the crowd's vocal support, demonstrated laser-like focus until the final shot, when she dropped her racket and clutched her head in shock, the New York Times reports. More»