Arsenal boss Unai Emery says any late signing this week must be better than what they have.

Emery was asked about a new defensive addition after defeat at Barcelona on Sunday.

He said, "But it has not changed, our idea and our message.

"Only if we can sign a player who really, really can improve our squad, then we are going to do that. If not, then not. We have good competitive players to achieve or try to achieve our target this season and we are going to be looking at something if we can sign someone, but with this idea.

"Only, and only, if we can improve."