Arsenal boss Mikel Arteta admits he's pumped Fabio Vieira for information on tonight's Champions League opponents Porto.

Vieira is in his second season at Arsenal after arriving from the Portuguese giants.

"Regarding Fabio really happy with him but at the same time sad because it's been a tough period for him," Arteta said.

“Especially with the last injury when he had some momentum and performances he got injured, that broke up his rhythm, just like last season. He's a player with enormous talent and we will get the best out of him.

“He was really pushing because he wanted to be here, that's for sure. Having an insider, someone who has experience as someone who has lived the culture and the club.

“It's very important in Europe to understand the context of the game. Where you're going, what type of club they are, what type of atmosphere you will be facing.

“He gave us some important information that's relevant for us."