Interesting article:
Era of tennis Grand Slam dominance by the Big 4 is OVER insists Rafael Nadal's coach - Mirror Online
I believe we will have at least 1 more dominant year (2 or more Slams), but that's about it.
Murray has never been able to recapture his pre-op form, Federer now 33 and can't keep going at that level forever, Nadal coming back from being gone for most of the 2nd half of 2014.
Novak still Number 1, and hopefully can stay there for another year, but not one hard court Major Final in 2014 a worrying sign.
Your thoughts?