What on earth are you trying to defend? I never compared 2017 to 2015. As I said, 2015-2016 might seem to be a complete field. But where was the top competiton? Nadal was at his career low and Federer was past his prime and could only compete in BO3. Djokovic of course took advantage of it to finish a NCYGS. My thread was discussing domination. Djokovic's achievement at 2015 was obviously more impressive than Federer's at 2006. But domination is another thing. No matter how many Slams and Masters Djokovic had in 2015, he did lose 6 matches against 4 players, 3 of which to a well post-prime Federer, while Federer in 2006 only lost 5 matches against 2 players, most to a peak clay GOAT.