Players are resilient guys and tomorrow, quite frankly, I suspect it'll all be forgotten - after all, they're not playing for Sven, they are playing for England. So to say it could affect their performance, that's an indictment of the players.
The best critics do not worry about what the author might think. That would be like a detective worrying about what a suspect might think. Instead, they treat the reader as an intelligent friend, and describe the book as honestly, and as entertainingly, as possible.