Coppell and Reading will face the Gunners on Monday.
He said: “They can play wonderful football but they will be judged on what’s on the shelf at the end of the season.
“Anything less than a trophy this year, they will look on as a failure given the start they have had and the foundation they have made.
“You can sense a real confidence coming out of their camp – from the manager downwards you feel there is more of a belief than last year.
“But they need silverware and anything less is relative failure.
“To a certain extent they are a team with something to prove.
“Those suggestions that they are not the side they were give them more of an edge than they would have had other wise.
“They have young players. It wasn’t long ago they won the Premiership but not many have got Premiership medals.”
