Sanchez scored the equaliser in Arsenal's 1-1 draw with Paris St-Germain last night.
And new signing Mustafi says he should be given credit for his work-rate in the game.
“I think in football today, modern football, it is not as static as it was and that's what makes the game so quick and so difficult," Mustafi told Arsenal Player.
“If you are a defender, you have to run all over the pitch to chase your striker and it is always difficult.
"I think we all know Alexis has qualities and he knows where to stand to give the opponent a difficult game. You have to give him credit for that."