Oh come on, not this old chestnut again! He had a 5 set battle with Del Potro in the semis. Murray also had a 4 set battle against Janowicz in the semis. Both semi-final opponents were serving bombs and hitting powerful groundstrokes (Janowicz was at the top of his form back then, not the error-machine he is now). Both finalists had 2 days to recover before the final and both of them were at peak fitness. They couldn't have been better matched.
However, Chico probably has a point about the pressure Djokovic was probably feeling. Murray's pressure was definitely greater because he was having to face up to the expectations of the home crowd and finally bring back a trophy no male British player had got his hands on for the last 77 years! Not having won Wimbledon before, he was very much the underdog facing someone who was a previous champion.
But, all the same, I can appreciate how Djokovic must have been feeling being in the position of the 'Bad Guy' out to spoil the party for Murray and the Brits and threatening to reduce the home favourite to tears for the second year in a row. Djokovic is a guy who loves to feed off the crowd's support and often doesn't play his best when he feels he's not getting it. To that extent, he's not as cold-blooded and ruthless as players like Federer and Nadal. In the 2012 final, Federer dispatched Murray with cold precision and then stood there clutching the trophy with a sheepish grin on his face while Murray sobbed in front of the microphone. He felt sympathy for Murray but he wanted his 7th Wimby title far more. Unlike Fed or Rafa, Djokovic doesn't quite have that killer instinct when he feels like the villain of the piece out to spoil the party. So I can appreciate how difficult it must have been for him too.