I remember years gone by the top players could sweep through their service matches, often to love. Sampras could do it, Federer in his earlier days. But now none of the big current 4 seem to have a domination on their service - the number of breaks between them is rather large. Even against the lesser players none of the big 4 are truly dominant on serve - and the number of times Federer couldn't even get in a first service yesterday was staggering. 3 DFs in a row?! Djokovic and Murray find the net on first service a lot, and Nadal's hard to judge given his continuing absence - but he was never a player with a famously dominant serve. Any reason why the top 4 these days are almost more impressive on receiving than serving?