The 24-year-old impressed in Arsenal’s 2-1 first-leg win over Barcelona.
Djourou said: “I think we made it hard for him at the Emirates. He always had people next to him and you need to keep them under pressure.
“We have to show the same focus and communication at the back – we learned from last year and showed a lot of character.
“We just want this so much and this team can achieve something great. Even if we are down we will continue fighting to the final whistle.”
