Charlton remained marooned at the bottom of the Championship table after a goalless draw against Preston.
Teenage midfielder Jonjo Shelvey came close for Charlton when he headed on to the roof of the net.
Team-mate Zheng Zhi then forced Andy Lonergan into his first save of the game in the second half with a skidding shot from the edge of the area.
Preston's best chance was created by Ross Wallace who picked out Jon Parkin who headed three yards wide.
Charlton coach Mark Kinsella:
"We are planning for next season and while I would like to say that we are planning for a season in the Championship we are all not stupid.
"League One is going to be difficult for all of us to take but we have got to get on with it. We will probably be favourites to come straight back up but it won't be that easy.
"We have got four home games left and it is up to the players to give the fans some performances now to be proud of."
Preston boss Alan Irvine: "You have to look at the circumstances (of the draw). We have been down to the bare bones before but we've stripped them even more today.
"We've had to dig deep and we could have felt sorry for ourselves, but they dug in and should be commended for that.
"We try and prepare the same way for away games as we do at home but the margins are very fine in this division.
"The break will give us a chance to get a few bodies back and there are six really hard games to go."
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