Portsmouth coach Joe Jordan has challenged the club's fringe players to prove their value.
Kanu, Arnold Mvuemba, Noe Pamarot, John Utaka and Glen Little have all featured fleetingly this season.
Jordan believes they have to remain focused and be prepared to stake their claim when it comes.
He told the Portsmouth News: "We have a demand coming up because we have a busy phase of games. We need players fit and we need to keep them fit. We need the players who are important to us because we have a lot of matches in a short period.
"There are those who are out of it because others are playing well. They are out of things because there are other players in the team. You can't play them all. But that's what competition is for.
"Some clubs trying to break into the top four don't have that player to come in when one of their big players gets injured or suspended. We have big players at this club. That's why we have brought them here.
"You have got to have players in different positions to make a demand on that position. You have got to have a squad to do that."