By Randy Walker @TennisPublisher So Juan Martin del Potro is officially a legend. The Argentine Gentle Giant, who has a biography by the same name here: returned to one of his favorite ATP Tour stops ...

Some of the best players in ATP history have missed out on the world No 1 ranking - we rank nine of the greatest.

Petra Kvitova, Gabriela Sabatini, and Hana Mandlikova star in our list of the best WTA players to never be world No 1.