Roberto Firmino netted in injury time against the Mexican side to set up a meeting with Flamengo in the tournament's showpiece on the weekend.
And Salah, who played an exquisite through ball to assist Naby Keita's opening goal, felt the win was secured by first-class efforts from every area of the pitch.
Having been announced as FIFA's Man of the Match for the game, the Egyptian told a press conference post-match: "Everybody played his role.
"Firmino joined the match in the final minutes and scored with his first touch, Alisson also saved many chances and the player [Trent Alexander-Arnold] who crossed [for the goal].