Manchester United boss Sir Alex Ferguson has called on his senior players to get their act together with the Champions League out of the way.
United had already qualified for the last 16 but lost to minnows Cluj ahead of Sunday's derby at neighbours Manchester City.
Boss Ferguson said: "Now the experienced players have to get their act together - as simple as that.
"We qualified early in Europe. After that we experimented and gave some young players a bit of experience."