Re: 33 combined slams vs 1 - does Murray have the right to be in a "big four"?
He does because even when he hasn't won the slams he has generally been the 4th person in the SFs. So relative to the rest of the field he was in the big 4 because he beat the lower ranked players just as much or almost as much as the others. The big 4 doesn't imply equality within that 4, it just implies that those 4 are all well above the standard of everyone else and so in practical terms are similarly difficult to beat for the #5 and below players.
Gilles Simon - Juan Martin del Potro - Grigor Dimitrov
Pablo Andujar - Philipp Petzschner - David Ferrer - Mikhail Youzhny - Simone Bolelli
Julien Benneteau - Juan Monaco - Tommy Haas - Gianluigi Quinzi - Tommy Robredo - Guido Pella - Lleyton Hewitt