GabeT
G.O.A.T.
The problem with watching matches to measure relative strength is that:Sure, ELO is useful within a year in terms or ranking players level play. I don't find it so useful for ranking all time levels of play though - not useless but it has too many issues for it to be any more than something to perhaps ballpark. There is no substitute for watching matches IMO.
a) people reach different conclusions from watching the same thing and
b) people fool themselves thinking they are being objective (a well studied psychological phenomenon)
So, as a result, we have all these threads that go nowhere, debating who was best and why. Don't get me wrong, I enjoy them and they can be a lot of fun, but there is no way to prove anything with any level of objectivity.
The other day someone posted a Sampras-Agassi video. To some it was clear Sampras would dominate today's USO. To me, watching that match, I saw winners that Murray or Nole would have returned, possibly as winners for themselves.The historical ELO ratings bring Sampras and Agassi down because "they faced few great rivals other than each other during their peak years in the 1990s, yet both often lost early in tournaments and weren’t as dominant away from Grand Slams as they were in them." (taken from http://fivethirtyeight.com/features/djokovic-and-federer-are-vying-to-be-the-greatest-of-all-time/). That's the kind of analysis that you can't do by simply watching a match.