Plymouth boss Paul Sturrock remains in talks with Luke Summerfield, Nadjim Abdou, Dan Smith and Mat Doumbe.
The Argyle quartet are out of contract at the end of the current campaign and Sturrock expects a decision to be made on their futures by the end of the week.
Sturrock said: "Our chief executive (Michael Dunford) is in discussions with all of them.
"Hopefully by the end of the week we will have a clearer idea of who has accepted our terms.
"I haven't ruled out any of them being here next season."