Arsenal boss Arsene Wenger was pleased with Samir Nasri's performance in victory over Porto.
The Frenchman was outstanding in the absence of skipper Cesc Fabregas.
Wenger told arsenal.com: "I believe Samir Nasri is developing very well. What he showed in the game tonight, he has shown in training, and we expected that to come out in games.
"He is a player with talent and he has shown that again tonight, he showed that on Saturday, and he has started to be efficient now. I believe the first pass against Burnley was great.
"Tonight on the first goal, he made a great pass to Arshavin and scored a great goal. The great players for me are the players who give assists and score goals. And that is what you want from him."