Sinner could play a great match against Djokovic and easily reach the Wimbledon final. Anyone who says Novak Djokovic is still a top-level tennis player doesn't understand much about tennis in my opinion. However, the possibility of seeing Cobolli in an all-Italian semifinal has faded, so let's hope Sinner at least reaches the final.
I'm sorry but I have to disagree with what you said about Djokovic, even at his age, he can still compete at top level tennis against this young guns like Sinner or Alcaraz. Of course there will be some sentiments for old tennis fans in saying that Djokovic can beat Sinner. But still though even in this past prime version of Djokovic, you wouldn't tell if he had that one last game in him to define his career on greatness. So he is a huge underdog against Sinner, but I do hope that he will give his everything in this game and go on reach the finals. The thing with Sinner though is that he could not be 100% as he might be nursing a injury he suffered against Dmitrov. He is wearing protective sleeve on his right arm, so we really don't know that extend till we see him go against Djokovic tonight.