Zack has been out for 6 months. He injured his left shoulder (two handed back hand)
mountain bike riding. Last year at the Countrywide Classic he got to the quarter finals by beating then #6 Fernando Gonzalez and Robert kendrick to get into the quarter finals. Zack got to a career high #127 before his injury. He had also qualified for the Australian Open beating #30 seed Augustin Calleri in the first round. He had the 4th fastest serve at the Aussie Open with a 138 mph serve. Smokin'! Welcome Back Zack

