Everton are likely to be without Mikel Arteta for the trip to Birmingham at the weekend.
Arteta has not trained this week as he has been struggling with stomach and abdomen pains.
Steven Pienaar and Tony Hibbert are also in the treatment room and the three are all major doubts for the game.
David Moyes wants Everton to make sure they do not slip up against Birmingham as they look to close the gap on Liverpool in fourth.
"We didn't play against Derby but we got the win, which was vital," said Moyes. "Obviously we want to play as well as we can in every game but at this stage of the season, the only thing that matters is winning.
"Just look back at the game against Fiorentina. We played terrifically that night but didn't get through, so all we are really interested in now is getting three points.
"We have not done awfully well against the teams down in the bottom half of the table recently and we want that to change against Birmingham but they will make it as difficult as they can for us.
"But the players have shown great leadership throughout the season and I'm sure they will continue to do that in the last five games. I have got no worries on that score.
"They have been terrific for us all season, so I see no reason why that will change now."
England defender Joleon Lescott echoed the sentiments of his manager and has his sights set on claiming fourth place.
He said: "I don't think it's an off-chance for us to finish fourth. We're three points behind Liverpool with five games to go and we've both got tough games to play.
"We play before them and we could be level with them when they go into their game on Sunday which puts the pressure on them again.
"But Birmingham are fighting for their lives for different reasons to our own. It'll be a tough game, our recent form hasn't been as good as it had been in the rest of the season."