Leicester boss Brendan Rodgers says Wesley Fofana's protracted move to Chelsea is impacting the "environment and stability" at the club.
Fofana, 21, has not featured in either of Leicester's last two Premier League games.
"We have talented players but it doesn't count for anything if you are not together," Rodgers said.
"Any environment where you can develop has to be stable. That is always something you have to enforce as a coach. Once the window shuts, it will settle everything down."
Bottom-of-the-table Leicester have only signed goalkeeper Alex Smithies so far this summer, while James Maddison and Youri Tielemans have also been linked with moves away from the King Power Stadium.