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Bionic Poster
Murray's best slam win vs the Big 3 was Nadal at the USO 2008. He never managed to surpass that.
After that, he lost surprisingly easily to Nadal at slams like Wimbledon 2010 and 2011, USO 2011, etc. His other win came against a hampered Nadal at the AO. And against Federer, he always did terribly, even when he was doing well Bo3.
He did better vs Djokovic but that USO match in the hurricane was a ****fest, his more impressive victory was the Wimbledon 2013, although Djokovic was playing terribly, Murray played great and it wasn't his fault Djokovic didn't show up. But then in 2014-2016 he was poor vs Djokovic too.
Always did terribly against Federer? They finished 14-11 in their H2H (Murray not winning any more encounters after surgery) and he beat Federer in a Bo5 final at Wimbledon, Fed's favourite surface and venue and also straight setted him in 2 Masters finals. No other player has dome as well against him.
In 2014-16, Murray beat Djokovic in 2 Masters finals (2015 Montreal, 2016 Rome) and in the 2016 WTF in a duel for the Y/E #1 ranking.