I happened to flick over to the coverage last night just as his meltdown in the 3rd set started. He had just been given his first code violation for audible obscenity towards his crew... then he received a 2nd violation for smashing his racquet... From what I could gather from the commentary, he was all over the other guy in the first 2 sets...then it was like someone flicked a switch and it all fell to pieces.
When he lost the 3rd set and then went down a break in the 4th, to me, he looked like he didn't give a shit, he wasn't going through his normal serve routine, wasn't chasing anything down... like he was basically conceding the 4th set and saving himself for the 5th set....which the scoreline indicated. He was meek in the 4th set, tried harder in the 5th, but eventually ran out of steam and maybe motivation.
He's got talent, no question, but he's just a complete douchebag and carries himself appallingly....