Villarreal veteran Robert Pires says Arsenal's young players have the ability to match the Invincibles.
Pires, 35, was part of the unbeaten Arsenal team which won the Premier League title in 2004. The Villarreal midfielder is convinced Arsene Wenger's current team can enjoy similar success.
He said: "Their playing style is still the same. It is a team which is always on the move.
"They are also a team with spirit. They haven't lost in the Premier League for three months. They ended the first leg better than us.
"But young players also lack experience. That's probably their failing."