Everton's promising start to the season has been derailed in recent weeks following defeats to Chelsea and Tottenham Hotspur while a 3-0 defeat to Italian side Atalanta in the Europa League will leave Toffees fans apprehensive going into Sunday's clash with Man United.
And Ferdinand, who spent over a decade at United as a player, believes the Belgium worldwide will become a hero for his former club if can shine at pivotal times. "I'm really sorry for the fans".
Atalanta - who are playing in just the fifth European tournament campaign in their history - impressed, but Koeman acknowledged that his side made a lot of mistakes on the night.
"It's a big lesson today", he said. "I don't see anything other than a comfortable Manchester United win". "You want to be involved in the team, but he knows the team is there for him when he needs us".
"After that result, of course you have thoughts about the team, individual performances and what we need to change", Koeman revealed.
"So that's a question to myself, what I did wrong".
"I wasn't so anxious after Chelsea, but it started after the reaction in the second half against Tottenham in that 45 minutes and in the first 45 minutes of yesterday". For some reason Koeman chose to play him out on the left against Spurs and he was pretty ineffective all game.
"They have signed all these players but last week they got ripped apart by Tottenham and they weren't much better at Stamford Bridge before that". Dominic needs time and Sandro needs to adapt to the Premier League. They are young. You can find many more excuses, but I don't like that.
Marcus Rashford has also been in good form this season and has scored in his last three games for club and country, with SportPesa offering him at 17/4 (5.25) to score first or 5/4 (2.25) to net at anytime. "We have players waiting for an opportunity", he said.
"But they had also seven or eight players more (than us) who fought, who won every battle, and had the right aggression". "We have more than 11 players available, so we can make some rotations", the Dutchman said. Okay, we need to accept it, but that's not the problem.
"I think most of the players are not at the level we expect".