Alcaraz is winning this one in my opinion, and he will get there 99%.
I literally just picked Tsitsipas because there is no other player from his bracket that I would rather have picked, but in all honesty I strongly don't see him getting to the semi finals, he's in an awful form and you could see a player that's not ranked eliminate him in very easy fashion, even though he has a quite easy route to the semi-fnals, while Sinner's route is the toughest as far as I can tell.
That makes two of us, I would have even preferred they didn't score at all, but not as though the result was of any relevance to me as both myself and my opponent had chose the same option.