He was passive all match, just like he was against Djokovic at AO. Funny enough followed strikingly similar scripts, Alcaraz comes out aggressive takes the first set in both matches 6-4, gets broken in the first service game of the second set in both matches he then plays passively for the rest of the match while the other guy dictates pace and loses 6-4, 6-3, 6-4 to Djokovic and 6-4, 6-4, 6-4 to Sinner.
Fair play to Sinner, he wasn't holding anything back in this match, kept up the aggression, didn't give Alcaraz a moment to breathe and choked the life out of him but Alcaraz never adjusted and almost seemed ok with losing the match, hardly even heard any of his trademark grunting which is a true sign that he was never really into it. He seemed kind of tired all tournament, he needs a reset for hard court season.
With all that said, Sinner earned it and is now a massive favorite for all the hard court tournaments. I have a feeling that he's going to be setting records, he looks unstoppable tbh. I think Federer's 237 consecutive weeks at #1 is in jeopardy.