I agree and I like to think that after the first set -- when he knew he had nothing to lose -- Andy secretly backed off to allow Jo-Wilfried the opportunity to preserve his dignity/pride. (They certainly looked like two players who like each other when they shook hands at the net after the match).
Well done, Boogers!
There can be no doubt that those two are on very good terms. Warm exchanges from both at the net and a joke shared. Respectfully, Andy commented on Jo-W playing better tennis in the 2nd set and thankfully he's never one to gloat.
It is possible, as you suggest Tomthoms that he slacked up which allowed Jo-W to win some games, but in that case he wasn't in full control of the outcome and only narrowly avoided a 3rd set when Jo-W held break points. TB are a risky business, if you want to conserve energy for the next round.
I dont see other top players hesitating to thrash an opponent, even if it means a humiliating defeat for them. Can one afford to let empathy get in the way of results? I reckon Mr. L. would have a ruthless approach and expect Andy to get the job done ASAP. Certainly is was good for the paying public that the match finished with better quality tennis than it started.