Coventry loan signing Adam Virgo has returned to Celtic to continue his rehabilitation from his knee injury.
Virgo, 23, joined the Sky Blues on a year-long loan deal this month but was injured in the game against Cardiff.
Coventry boss Micky Adams told the Evening Telegraph: "Adam's injury is obviously long standing.
"He has gone back because there is very little we can do for him at the moment. But as soon as he can start running again we will get him back down here."