"I had an impact on the season, ' the Frenchman said at a Football Writers" Association event to raise money for the Grenfell Fire victims, 'because at some stage the players came to see me and said, "What's going on boss?"
"We didn't manage to do that last season so I'm not super optimistic in that regard, but we have the firm intention of not selling him".
Has Sanchez played his final game for Arsenal with Paris Saint-Germain and Manchester City still reportedly interested in signing him?
"Plenty of uncertainties about players who didn't play against Chelsea", Wenger added.
"For us, Alexis Sanchez is a loss of course but we had all the other players prepared in pre-season already and it can happen in preparation any way".
"We need to transform the quality of the preparation into points and that is, of course, a pragmatic view, but what matters is we win the game and start in a strong way, which we didn't do a year ago".
He has said he intends "to focus completely on the Premier League", but if such an approach fails to yield a title challenge, he can expect the protests to ramp up quickly.
Meanwhile, Craig Shakespeare hopes Leicester can end their Arsenal hoodoo tonight.
Spaniard Iborra has been ruled out of the trip to the Emirates Stadium with a groin strain and joins centre-back Robert Huth and midfielder Danny Drinkwater on the sidelines.
"That's the the big question mark - are they better than Tottenham, Man City, Liverpool or Man United? Where do you go?"