I just caught saw the last 2 and a half sets on stream. He didn't appear at all injured really to me ( as Miriambee said no rubbing of effected parts, which he is normally never slow to do ), but his movement around the ball was certainly awful at times, like just playing it from where he stood rather than move his feet to play the ball positively and well correctly !  And he was so passive.

Virtually looked ready to fall over after some shots that he missed, but that slumping is just generally a rather annoying habit he has, particularly when he is in one of his more passive days.

Difficult to know how this seeming lethargy was effected by the heat, but yes as Milo suggetred he did appear more engaged come the conclusion and hit through the ball a bit more.

Difficult to know whether to hope it was more  a physical problem ( in which case hope it doesn't effect him further ) or mental ( would be very disappointing as I really thought he had learned to be more positive in both his play and his body language ).  I tend to think a bit of both, that the heat certainly had some effect on him ( as I say he did not appear at all injured ), but I am afraid to me some also looked mental.

Anyway Lopez won more points ( 162 to 154 ), played many more points on Andy's serve ( 170 to 146 ) and won quite a higher % of return points ( 34% to 26% ), so it was a rather good one to win given that.  Big chance missed today by Lopez, who took some wrong options at important moments, thankfully !

We've been here before with Andy. having a very poor one for whatever reasons, and he has regrouped, but he could very much have done without such a long match in that heat.