Tennis great Andre Agassi spoke about modern day rivalries in the game during the 18th session of the Hindustan Times Leadership Summit. ‘The day I played Federer, that was the day I realised I was playing the greatest player of all time,’ Agassi said during the conversation. Agassi also opened up on Rafael Nadal and Novak Djokovic.  I never got to face Nadal’s best tennis and I’m thankful for that. Novak is someone who can play on any surface and be capable to win. And that is a big thing to say. Overall, tennis is the winner,’ Agassi added.