Zappos is a proud sponsor of the Sony Ericsson Open, currently being played in Miami, FL. This is the second straight year that Zappos has sponsored the prestigious tournament. This year’s field is one of the strongest ever, with most of the top players in the world competing in the Men’s and Women’s tournaments. Top ranked Roger Federer was upset in yesterday’s action, while Andy Roddick and Rafael Nadal have advanced to the quarterfinals. Three-time SEO champion Venus Williams reached the semifinals in the Women’s draw.