Hard to say, but yeah concerning signs. His best days are probably behind him, but then again just a few months ago he played lights out in a slam final. He is pretty much slam hunting these days so his concentration and drive for non slam events is probably not going to be there.Novak fans are welcome to reach for the panic button now.
Nadal’s form looks average too, but at least he’s winning. I expect Tsitsipas to win the final though, at least he should, clearly the form player.