“But in the last few weeks I felt it was getting more difficult for him, particularly with the team results, and I thought then it was unlikely that he was going to stay on after the end of the season.”
Yet Dein does not rule out the idea of Wenger, 68, taking on a new managerial challenge and says: “Over the last few years he has been approached by some of the biggest clubs in the world.
“Real Madrid, Paris Saint-Germain, the [England] national team… they all wanted him at some stage.
“He’s going to be 69 in October but he keeps himself extraordinarily fit. He’s the same weight as when I first met him, he’s got a very active mind and such a knowledge of the game.
“Life without Arsenal is going to be tough for him initially. It’s a way of life and he will feel there is unfinished business.
NEWS GROUP NEWSPAPERS LTD: Fans paid tribute to Arsene Wenger during the win against West Ham
“It’s rather like a bereavement and the various stages. The first stage is denial and finally you get to acceptance and you move on.
“So Arsene has to have a good holiday and decide what he wants to do next.
“But he will go down in history as the greatest Arsenal manager ever. What he has done for the club is immeasurable.
“We’ve built a fantastic training ground and a sensational stadium and it was all on the back of the 2004 Invincibles that we managed to get the financing for the stadium.”