But Coppell would rather have England Under-21 international Rosenior to call upon as Seol, who lives near Fulham's training ground, had engineered the switch in the first place.
He said: "We got the better deal because Seol didn't want to be here.
"He made that clear to everybody here. He wasn't kicking up a stink about the situation but was very quietly, but equally forcibly, saying he preferred to move on.
"He said he wasn't guaranteed first-team football but at the time he was in the first team. There was also New Malden as well, the centre of the Korean community, so from a family point of view he preferred to go."