Excellent point about Nadal's "ons". What's your analysis of Murray's success against Federer then?
Federer's problems against a good defender : catching every ball back whereas Fed can make an error in the end, good passing-shots, focusing on his backhand.
Some points which Nadal uses ... but without Nadal, which shows it's not only about Nadal.
See also Fed against Simon.
Also Murray has a good return whereas Federer likes making easy points with his big serve, especially as he gets old,
and Murray has a good first serve, whereas Fed's return is not so good. Also it's useful in tight moments when Federer puts some pressure.
On the mental point of view, Murray has a clear confidence against Federer and focuses more on Fed's weaknesses than on his strengths, he's persuaded he can beat him "winning ugly" (maybe Brad Gilbert took a role in that
) : see how he's said that previous Fed's opponents have not used Fed's weaknesses whereas I think he underestimates the fact that these players like Roddick don't have the same weapons as him.
However, I think that in Wimbledon, Murray put too much pressure on himself about Federer : he should be very calm about him and not play too much "words' games", especially in Britain where he's the one who has the pressure. He's still young and doesn't have Federer's strength and experience about that pressure. He gave me the impression of being too "touchy" since Federer's words in Dubai nearly two years ago, and putting himself in the position of the "adolescent against the adult-father", which is not good. He still looks not completely mature to me.