Current hopes are the Harrisons, 17-year-old Ryan and his younger brother Christian, who are both at the Bollettieri Academy.

CNN: Where are America's future tennis champions?

Despite the talent of the likes of the Harrisons and more established young players such as Oudin and Isner, Bollettieri does not believe that future success is guaranteed.

CNN: Where are America's future tennis champions?

On the first day back in Graz - 13 August - the Harrisons were filmed by a German TV crew, such has been the international interest in Daniel's story.

BBC: England

The only serious omission on the CD is Strawberry Fields Forever - a number one single as a double A side with Penny Lane - and one can only imagine that the single was sacrificed to make way for one of George Harrisons' songs.

BBC: CD Review: The Beatles