United may have to resume defending the European Cup without an important player following Nemanja Vidic's dismissal in the FIFA Club World Cup final.
The Serbian centre-back's punishment after being red-carded against LDU Quito is likely to be carried over into the UEFA Champions League, given United were that tournament's representatives at the world jamboree in Japan.
"If there is a suspension, we have been informed it will be in the European Cup," said Sir Alex Ferguson, who had no complaints about referee Ravshan Irmatov's decision.
"The referee was correct to produce the red card. It is a softish sending off but Nemanja gave the referee no option. He didn't swing his elbow but he did catch him (Claudio Bieler) with it when he pushed his arm back.
"It was disappointing because we were in a comfortable situation - Vidic and Rio Ferdinand were having their easiest game for weeks.
"Nemanja is a bit disappointed with himself and now we must wait to see what the outcome is. It depends how FIFA interpret it and how UEFA act in terms of the information they get. But he will miss at least one game."
And that game could well be the first leg against Inter Milan, in the San Siro, on 24 February. Look out for confirmation of this in the coming weeks on ManUtd.com.