Arsenal boss Wenger: Man Utd suffering their own Henry moment
Wenger, whose Gunners travel to Old Trafford this evening looking to defend their 100 per cent record, said: "Thierry was, in the end, a personality that had a big weight in the team.
"Also no one could refuse to give him the ball so when he left our play sometimes became a bit more diversified.
"Players like Alex Hleb started to gain more charisma and we had Emmanuel Adebayor, but it takes time.
"United have some big personalities in the team. But Ronaldo won Player of the Year and European Player of the Year so suddenly they have a lack of charisma around them and everybody will look at their team differently.
"Ronaldo didn't look as convincing as the year before. Though when you look at the numbers of games he played and the number of goals he scored he was still as efficient as before.
"I believe they will miss him. When a player becomes too strong in a team, others are a little bit isolated or forgotten.
"So when he disappears many of the players turn up because of the way the game goes through different players.
"Yes, you could say this is their Thierry Henry moment."