Neville led the tributes for the former Red Devil, posting on his Instagram story: "All my love."
Rooney also paid his respects to the football icon, writing on X: "Legend. Thoughts with all Denis’ family and friends ❤️."
De Gea, now at Fiorentina, replied to the news on Manchester United's official account, saying: "❤️🙏🏼."
Manchester City, where Law spent two years, also replied to their rivals' post, adding: "The whole of Manchester, including everyone at City, is mourning with you. Rest in peace, Denis. Our thoughts are with Denis’ family and friends at this difficult time."
The Scottish National Team page left fans reflecting on the legacy of one of their greatest ever players, posting: "A true great. We will not see his likes again. Denis Law. 1940-2025."
Liverpool's tribute read: "Sending condolences from all of us at LFC. Denis was a rival player but so highly thought of. As Bill Shankly once said, 'Denis Law could dance on eggshells.' Our thoughts are with Denis' family and friends at this very sad time."
While UEFA's official page listed some of Law's incredible achievements, adding: "On behalf of European football, we are deeply saddened to learn of the passing of Denis Law. One of Scottish football’s true greats, he was a Ballon d’Or winner in 1964 before lifting the European Cup with Manchester United in 1968. Rest in peace, Denis."
Finally, the Premier League paid tribute, posting: "We are deeply saddened by the passing of Man Utd and Scotland legend Denis Law He won multiple domestic honours, the European Cup and the Ballon d'Or across an incredible career Our thoughts are with Denis' family and friends at this difficult time."