Wenger: Derby is huge test for Arsenal
"We want to keep our home strengths and it is a weekend where we can stay in the position where we are in.
"We do not want to damage that position because you do not have completely the right focus.
"It was only two months ago that people were saying we had no chance of finishing in the top four.
"I had a massive belief in them, but how far they go is down to us. That is the challenge we have in front of us.
"The belief has been strengthened but we have not won anything.
"It is all to do. I have the belief we have the potential to win, but it is all to do."