SportsTrend.Info, the sporting-goods industry's authoritative source for product-sales information, has released this week's sales figures for the tennis-shoe market. Using the most current point-of-sale data compiled from the nation's leading sporting-goods retailers, department stores and specialty stores, SportsTrend.Info each week tracks exactly what products consumers are purchasing and in what city and region they are being purchased, as well as the corresponding price information. The top-selling tennis shoes for the week and year to date, based on units sold, are as follows: