Does Dent have enough gas left in the tank????

Dent just recorded a win against James Blake at the Atlanta Championships this year. He has shown great improvement in his game and his plan of action. But Dent has to play a lot better to crack in to the top twenty of the world world. Dent s has been out of the game and the tour cause of some back injuries and is trying to get back to brand new as soon as possible. Does he have enough left out to perform at his best and crack into the top ten or will he retire before even reaching the top 50 is the topic of argument????!!!