This is one of the most important weeks for James Blake. The former world no. 4 made his debut as the Miami Open tournament director and on Tuesday he held a question and answer session with his followers on Reddit. He recalled the best moment of his career, at the Beijing Olympics in 2008: 'The greatest match I've played was to beat Roger (Federer) in the Olympics.

He's, in my opinion, the greatest of all time and to get a win over him with the USA on my chest was really special.' That was the only time the American defeated the 20-time Grand Slam champion. Asked who were the best five players he ever faced, Blake indicated Federer as the first.

Then Novak Djokovic, Andre Agassi, Andy Roddick and big server Ivo Karlovic. ALSO READ: Stefan Edberg: 'I don't know from where Roger Federer finds motivation'