20-time Grand Slam champion Roger Federer has announced that his signature shoe “Roger Pro” is now available for purchase by general consumers. On the eve of his long-awaited return in 2021, Federer was spotted training in a yet-unreleased pair of sneakers.Not seeing Federer in his favorite Nike shoes was a bit strange and it was later revealed that the shoes were designed in a collaboration with Swiss running brand On. Federer debuted the Roger Pro in Doha and wore them at each of the five tournaments he contested last year.Last year the Roger Pro went on sale in limited quantities, but now they are …