John Isner (USA) gets in some practice on Monday during the Atlanta Tennis Championships at the Racquet Club of the South in Norcross, GA.

John Isner (USA) practices his serve on Monday during the Atlanta Tennis Championships at the Racquet Club of the South in Norcross, GA.

John Isner (USA) practices on Monday during the Atlanta Tennis Championships at the Racquet Club of the South in Norcross, GA.

John Isner (USA) smiles during his practice session on Monday during the Atlanta Tennis Championships at the Racquet Club of the South in Norcross, GA.