Manchester United manager Jose Mourinho has hinted that Zlatan Ibrahimovic could start the Manchester derby.
"Zlatan is not injured," Mourinho said. "He sometimes needs some very hard work on the muscular area which supports [the] knee which had problems.
"When a period of hard work comes, also the fatigue comes. To work really hard for a certain period of time, he cannot play in these days, so we decided to do that after Watford (a 4-2 win last week).
"He's on that cycle of work now, divided between gym and pitch. He'll be out again tomorrow [Tuesday], but back to normal work after CSKA.
"All other players who were out are still out. But I could make a surprise and one who isn't available may play."
Ibrahimovic made his return from his knee injury against Newcastle United, and has since made three further appearances, against Basel, Brighton and Watford. He is yet to complete 90 minutes, however.