Martin Taylor's X-rated tackle left Eduardo with a double leg break and also shattered his team-mates.
Wenger said: "What sticks in the mind? That we didn't win the game and that Eduardo was severely injured. There were a lot of incidents. The penalty, Gallas's explosion a little bit.
"I still believe that was a big blow. We lost Eduardo for the season and we dropped two points. We couldn't win after that. My concern was for Eduardo. Will he play again? Will he be injured for ever? How long will he be out?"
Wenger was fuming after the game and called for Taylor to be banned for life and then to be suspended for as long as Eduardo stayed out.
Neither Taylor nor Eduardo is fit for today's game but Wenger insisted there would not have been any worry had they faced up.
He said: "No there were no fears. I was very angry after that game. I was a bit excessive maybe against Taylor. I apologised after that but I still think it was a clumsy tackle. It was a shock for the team to see the leg of Eduardo.
"I don't remember what was the first thing I said to him, but it was a very, very bad day. What saved his career was the action of our physios and the quality of the surgeon."