Rohan Ince has left Charlton after injuring his knee.
The former Brighton midfielder, now a free agent, played in two of the Addicks' pre-season games.
And a decision will be made on trialist Simon Dawkins’ future before Charlton host Shrewsbury next weekend.
The Addicks are in desperate need of midfielders after Jake Forster-Caskey suffered a season-ending knee injury on Thursday.
When asked if the club will sign a replacement, Valley caretaker boss Lee Bowyer said: “Yeah, I’m sure we will.
“I’m sure the owner will give us another midfielder because Jake is a big part [of our team].
“Rohan Ince is injured so his time will be up with us now.
“With Dawkins, we’ll keep looking at him. He’ll keep training with us. But we’ll have to make a decision one day this week ahead of next weekend.
“There’s something wrong with Ince's knee. He had a scan yesterday.
“He came with it so how he’s been training every day and playing in the games I don't know. He’s injured.”
Meanwhile, Bowyer also revealed a goalkeeper will be joining the club before the transfer window shuts.
Dillon Phillips has been handed the number one shirt, but needs competition. The goalkeeper was beaten at his near post for Sunderland’s opening goal in a 2-1 defeat today.
Bowyer added: “We need a keeper to challenge Dillon.
“There will be another goalkeeper coming and a defender to come in and also a midfielder. They are the priority [positions].”
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