Postpublished at 20:22 British Summer Time 10 July 2017
*Nadal 3-6 4-6 6-3 6-4 12-13 Muller
No-one is moving from their seats. They're engrossed. Or they've been sat down for so long that their legs have gone numb. But I think it's definitely the former. This has been a herculean effort.
Here's Nadal, serving to stay in the match.