Patrice Evra admits Manchester United's players need to 'look in the mirror' following their embarrassing UEFA Champions League exit.
United needed only a draw against Swiss hosts FC Basel to clinch a last 16 place, but a surprise 2-1 defeat condemned them to Europa League football in the New Year.
Boss Sir Alex Ferguson rejected suggestions United were struggling to qualify after they only managed to beat Romanian minnows Otelul Galati in their opening five games.
But Ferguson and his players were left humiliated by Wednesday night's defeat and Evra admits everyone must take responsibility.
French defender Evra said: "We have to be honest and say we haven't been professional from the beginning of this competition. I don't know why.
"Maybe one or two of us have to look in the mirror and say we can do a lot better than we have done.
"Everyone. And I am the first."
Evra also warned his team-mates they cannot afford to throw away their season amid disappointment of failing to progress from the group stage for only the second time in 15 years.
Defending Premier League champions United trail current leaders Manchester City by five points and look to bounce back from the Basel defeat when they host struggling Wolves at Old Trafford on Saturday.
The left-back added: "We have got to get back and get focused on the Premier League. That's the target - to win the Premier League.
"We must make sure we don't throw the season away.
"We still have things to win and must make sure we play with heart."