Arsenal fullback Nico Yennaris expects a major test against FA Cup opponents Aston Villa.

Although Sunday's visitors could be without Charles N'Zogbia - a potential direct opponent for Yennaris - they still pose a serious threat.

"I think they have been up and down this year with some bad results and some good results," Yennaris told Arsenal Player. "But we know the players in that team and we know that there is quality there so they can be a threat at any time."