Seeing Djokovic beat Nadal on clay at Monte Carlo and Federer on indoor hardcourt at the World Tour Finals really underlined how dominant Djokovic has become since 2011. Murray looks capable of beating the big guys at Wimbledon, the US Open and the Australian Open. Encouraging (if admittedly sporadic as of yet) performances from the likes of Raonic, Dimitrov, Tomic, Gulbis and others may be an indication that the new generation are almost ready to make a breakthrough and sweep the last remnants of the Fedal generation away. This turn of events got me wondering; 1. When will Federer and Nadal retire? 2. Will there come a point before they retire where they can no longer hang with the new generation and if so, when will that point occur? 3. Bearing your answer to the last two questions in mind, how many more slam finals will they each make before retirement? 4. How many of these finals do you expect each player to actually win? Anyone up for some interesting and productive discussion on this topic?