Federer pens tribute to retiring Nadal

Swiss tennis legend Roger Federer has paid tribute to his retiring rival Rafa Nadal, telling the Spaniard he challenged him like no other player and that he had made the tennis world proud during a glittering career lasting over two decades. +Get the most important news from Switzerland in your inbox Nadal could not conjure the fairytale ending his career deserved as the winner of 22 grand slam titles bowed out with defeat in the Davis Cup on an emotionally charged and tearful night in Malaga on Tuesday.