Unai Emery emphasized Arsenal's need to improve their defense after a 4-1 win over Fulham.

“Today was the first time we could play with Sokratis [Papastathopoulos], [Shkodran] Mustafi and [Laurent] Koscielny. Then came an injury from Mustafi in the first half so we changed to a back four. We are very happy with the attacking players. We need defense also to take more balance and improve," said Emery.

Emery added that the club is open to signing new players over the winter. 

“The club is working, watching different possibilities. Maybe we can if the transfer market gives an opportunity to sign one or two players.”