2006 I could see a case for maybe, but 2015 was definitely weaker. I dont think we agree on how weak 2010 was, with you thinking it was worse than I did (maybe since Nadal won 3 slams that year, lol, jk). Even if you think Federer and Murray in 2010 for instance werent great, both were easily still better on the whole than 0lderer and Murray in 2015 IMO. By 2015 Federer wouldnt be capable of the tennis he played at the 2010 Australian and 2010 WTF even on an occasional basis anymore, and his lows were lower than his 2010 lows too. And Murray was consistent but flat out not that good in 2015, unable to even threaten the big guns in the least, which he could do in 2010. I am going by the fairly obvious that despite the year end rankings Murray was better than Djokovic in 2010, which is why I am mentioning him before Djokovic. And the rest of the field in 2015 was much worse than a field that still had Soderling, Davydenko, Slumpovic, Berdych, Tsonga, all being pretty good.