American tennis is in what you could describe as a transition. With Andy Roddick retired and the Williams sisters not getting any younger, there are empty places atop the American tennis ladder.
Over the next few years, there will be a number of young Americans who slide under the radar as they move on from the junior level. They will be grinding away on the Futures circuit and Challenger Tour vying for valuable ranking points to unlock main-draw entries.
But once they have gained experience and resurfaced onto the Grand Slam scene, who can you put your money on to lead another era of American tennis dominance?
Here is a brief insight into five young guns that just might be the future.