I love Juan Martin but he really has no business being included in this big four over Murray. One fluke (yes, it was
) slam win over Federer does not negate the fact that Murray has had a lot better career results. Results are what makes a player, not what-ifs and what-mights. Delpo can claim a slam, but he still has no Masters title and has yet to follow up his slam final with another one. Murray may not have a slam, but he has a ton of other results that speak to his ranking.
Bit harsh to say, yes things fell in his favor, and yes Del Potro was extremely fortunate with his run and winning the second set. Remember, the incorrect call that was made against Del Potro who waited forever to challenge the call and rattle Federer. Yes, the correct call was eventually made thanks to technology, but one must admit he was quite fortunate.
Either way, his success was not a fluke. Big hitters like him are bound to strike gold here and there. I mean he had beaten Nadal three times in a row and followed up the US Open win with that final in London beating Federer again along the way. Maybe he wouldn't win a slam again, but to say he wouldn't have been just as good if not better of a top 5/4 player as Murray is pretty silly. I mean fluke or not, Murray still isn't able to win a slam despite having all those SF/F opportunities. Murray would have had the same path (Del Potro > Nadal > Federer) at that year's US Open had he beaten Cilic, but he failed. IMO it is extremely unfortunate for Juan Martin and I believe he would have been a consistent number 4. I mean despite the injury, he still nearly made the QFs in Australia.