The Gunners slipped 2-0 behind at Emirates Stadium after goals from Luis Suarez and Jordan Henderson although they rescued a point thanks to quickfire strikes by Olivier Giroud and Theo Walcott.
"It was a great football game where both teams went for it," Wenger said.
"It was entertainment. We could honestly have lost the game but could have won it by three or four goals difference.
"It shows we created many chances going forward but were nervous defensively. The goals we have conceded show we were nervous from the start. Overall we showed great quality in the offensive period."
Asked what was behind the defensive nerves, Wenger added: "Recent history in the big games at home plays a part, you could sense it from outside.
"We have to get rid of that psychological factor when you play at home defensively.
"We have to focus on playing football and what we want to do to the opposition.
"I believe the quality is there and we have to trust it and forget what happened in the past. What happened in the past, you could see it played in our heads at the start of the game."