No English club reached the semifinals of last season's Champions League.
"I still think the Premier League is the strongest in Europe," said the Frenchman ahead of Braga's visit to Emirates Stadium. "We have to show that last year was an accident.
"Unfortunately we went out against Barcelona, who were better than us over two legs. We have to come back and show we can compete with them. Overall I think it was an accident but we will see."
Wenger raised a laugh when he was asked how many of the English quartet were real contenders to win it.
"Four," he replied flatly.