NEW YORK - Tennis superstar Roger Federer has done it again. During a thrilling volley in the second set against Argentina's Brian Dabul, Federer sent three balls flying past Dabul with a stunning backwards and between the legs shot. It was a move that mirrored a shot of his from a semi-final match last year. But he upped the ante on this one by sending the tennis ball rocketing out of Dabul's reach and two other smaller balls right to the base line. All three balls were called in according to the line judge. Dabul marveled at Federer's tenacity and just decided to give up and retire from the sport of tennis right there. "I will never be the man that Federer is, or the man that he was," said Dabul. "The dedication he has to this sport is just unbelievable. He leaves everything out on the court and by everything I mean his balls. He just emptied his scrotum right there on my side of the court. Just wow. Then he makes the ball boys run out and grab 'em up."