The goalkeeper suffered a shoulder injury while representing Senegal at the FIFA World Cup.
Kepa Arrizabalaga has started both games for Chelsea since the post-World Cup restart and will do so again when Manchester City visits Stamford Bridge on Thursday evening.
“He’s been training a little bit more than he was,” Potter explained.
“He’s not fully fit at the moment, but hopefully he’ll make some progress in the next week or so.”
Chelsea manager Graham Potter has warned that his team can put Manchester City under pressure when the two teams meet at Stamford Bridge on Thursday night.
“We have to play well for ourselves,” Potter said.
“Then you have to understand their quality and try to stop it. When you boil it down, it appears simple, but it isn’t.
“They are a top team but we can cause them a problem, we can be ourselves and try to play well and put them under pressure. “We’ll use Stamford Bridge and see what happens.”