Former England defender Keown, who played 449 times for Arsenal and was part of the Invincibles squad, also blasted the Gunners' Chilean ace, adding: "Sanchez is a hard man to manage off the pitch".
He added: "One of them is, of course, what is happening with the manager, the future, the players who have to come in, the renewal of contracts".
ARSENE Wenger's future as Arsenal manager will be decided at a Gunners board meeting after the FA Cup final against Chelsea on May 27.
Arsenal are in real danger of missing out on qualifying for the Champions League for the first time under Wenger.
In their email the club said of their failure to make Europe's top club competition: "Obviously it's disappointing for us all not to have qualified for the Uefa Champions League for the first time in 20 years but we must now focus on a different competition, facing new teams and challenge to win the Uefa Europa League".
Asked what Everton need to do to step things up given the way 2016-17 has gone, Koeman said: "We had a really strong home record, but I think we need to improve away, and we need to be more clinical, more productive".
'Angry Birds' sequel set for September 2019 release
Thurop Van Orman, the creator of animated TV series " The Marvelous Misadventures of Flapjack ", will direct the film. Angry Birds characters Bomb, Chuck and Red are pictured during the premiere in Helsinki, Finland, May 11, 2016.
Wenger has come under increased criticism and pressure from supporters this season, with protests from the terraces including a match boycott and fly-by aeroplanes carrying banners. I would like to see him stay on because I think he still has loads to offer but I'm not sure all the fans would want that.
"I do not give too much importance to what Tony Adams says", Wenger said.
Wenger admitted after the game that the problem looked serious and the Brazilian is a major doubt to face Chelsea meaning Arsenal are facing a defensive crisis.
Ferguson, who battled against Wenger's Arsenal sides to win 10 of his 13 Premier League titles, questioned the short-term thinking that is creeping into football and urged clubs to plan for the long term when making their managerial decisions.
The France global revealed earlier in the week that he requires daily treatment on an Achilles problem, but it is a slight calf injury which is now causing him grief.