ATP Finals are going to be pretty dull this year especially if Djokovic doesn't pop up.
Ruud and Rublev barely win matches. They keep losing to mugs.
Fritz Medvedev and Zverev are hardly better. They look awful since the US Open (and long before the US for Medvedev).
De Minaur is in better form but not sure he's top-10 material. He would have never qualified with this level a few years ago.
Alcaraz is on his worst surface. I think these courts are too fast for him although I'd still favor him against any of these guys.
Sinner hasn't played since Shanghaï and is fighting a nasty virus at the moment. There may be some rust and lack of rhythm in Turin.