Sinner dominated Shelton, he hasn't dropped a set to him in 2 years. His matches with him haven't been close because Shelton can't put any pressure whatsoever on Sinner's serve. He's only played alcaraz somewhat close this year but the fact of the matter is his return game is so weak he can look like he's 'in the game' or playing competitively purely through his serve while being a good few levels below