Djokovic has made all 4 grand slam semi finals. He's going to be ranked inside top 5 after US Open and top 4 for this season and he plays 25% of the tournaments.
If not for Sinner/Alcaraz he would have 5+ more grand slams
After the first match, I thought he was going to fizzle out, but he was just cleaning up the rust. Against Fritz he was gasping for air on long points. Half of me thinks it is for show, other half thinks Father Time is exponentially catching up to him.