I am surprised that Andy won the first set, when I looked earlier he was a break down in it. That said, he'd had a fair amount if BP chances so maybe not so surprising...
Haven't seen any of it. But on the face of it and what comments I have read re his win vs Sandgren, that's a very encouraging couple of matches from Andy.
I see 13 aces ( 1 DF ) in his first match followed by 10 aces ( 4 DFs ) today. Long matches and I believe fast courts but that too is encouraging after comments on his serve when he first came back.
I think with Amazon Prime you pay for the viscerality to watch the match live but then they show it free as a replay. That's how it works on my TV anyway.