BBC Two have given a 1300-1800 slot, it looks like today's play will go well over that given Murray's match is currently 2 sets to 1 and there is still Edmund's match to follow. They've got an extra hour scheduled on the red button from 1800 but Scrum V at 1900.
If Murray v Del Potro goes into a fifth past 1800 will they keep it on BBC Two, and will they stay with it for Edmund's match or drop Scrum V from the red button?
The second match of the night has only just finished, presumably on the red button. 2-0 down now so a chance of an epic comeback on Sunday dependent on the doubles tomorrow, or alternatively more reruns of Bargain Hunt and Escape to the Country.
John Inverdale has been the lead commentator throughout this - is Andrew Castle on Eurosport?
No he said on twitter he is presenting on LBC and Smooth which is why he is not commentating for the BBC and the usual Davis Cup deputy Jonathan Overend is in Rio for 5 Live Paralympics coverage. Nick Mullins made a rare BBC appearance outside of Wimbledon covering the Edmund match on Friday Night but Inverdale has done the rest.
Simon Reed & Chris Bradnam are the lead commentators for Eurosport this weekend.
BBC2 couldn't wait to cut away at the end. Sue Barker said they were running out of time for any analysis, and what for? A five minute edition of Coast at 1855.