"He probably has one eye on that Liverpool game but then again he may not want to face the flak again for the decisions he made in that Manchester United game," said Derry.
"Who knows? Mick McCarthy is the only person who can make those decisions.
"Whoever we play against on Saturday will want to produce some good form because even if they are not in the first team they are going to want to show they are a capable player.
"We are under no illusions it is going to be a very tough game but one we are looking forward to playing."