Cinci and US Open werent fast this year. Cinci has no roof. When i say fast i mean AO or indoor tournaments like WTF, Six kings, Paris. Sinner will easily win Paris too. I just watched Alcaraz vs Rinderknech practice at Paris and noticed Alcaraz not being able to return Rinderkneck serve. It seems the surface is too fast for him. Same thing happened at Six kings slam when he couldnt return Sinner serve. Sinner serves way better indoor. So why should it change in Paris? Easy title for Sinner. When Alcaraz cant return the serve( or bad return) he gets straight setted every time!