Arsenal boss Arsene Wenger is convinced Liverpool are still in their Champions League tie with Chelsea.
Wenger said no-one should write off Liverpool, even though they were defeated 3-1 at Anfield by Chelsea.
Wenger said: "Arsenal v Villarreal and Manchester United v Porto are still to be decided. Barcelona looks to be through completely and Chelsea are in a strong position.
"But it is still to be decided because Liverpool can respond and be strong away from home.
"Everywhere you play at the moment you have to be completely 100%. If you are just a little bit off your best you get punished."
