It appears to be confirmed that Andy's match is on second. That being the case, it means that he will be performing during the hottest part of the day's desert heat.
This is a greater consideration than his match will be suitable for UK viewers and supporters.
Do we know how hot it is there? It's not a humid heat, which I think Andy finds more difficult. Anyway, as we have no control over scheduling we might as well enjoy the fact it's at a convenient time for his UK fans.
Just checked and the website says it will be mid to higher 70s 1-2pm rising to 79 by 3pm so shouldn't be too bad to play in I think? And remember Andy has been in Miami getting used to the heat, albeit a different kind of heat.