Chelsea are waiting on the fitness of captain John Terry and midfielder Frank Lampard ahead of their trip to West Ham tomorrow.
Lampard's chances of facing his former club look slight after hernia surgery although manager Carlo Ancelotti is hopeful he will be available to play.
Terry, who like Lampard missed out on England's two Euro 2012 qualifying victories over Bulgaria and Switzerland, is battling to shake off a hamstring injury in time.
Both players are understood to be back in training but Ancelotti may decide not to risk them against rock-bottom Hammers.
Ancelotti is determined not to rest on his laurels after winning the double in his first season and guiding the Blues to an unbeaten start to the new campaign.
The Barclays Premier League leaders travel to Upton Park for their London derby having scored 14 goals without reply in their opening three games.
West Ham, under former Chelsea boss Avram Grant, have yet to score from open play in the league this season - having conceded seven goals.
But despite his league and FA Cup success last season, the Italian coach still believes there is room for improvement.
"In football there are a lot of things, a lot of details that you can always improve," he said.
"Every experience can give you the possibility to improve. I had good experience before I came here and now I think I improved with this experience.
"There are not a lot of differences between Italy and England, but I think the English players have a stronger mentality, they like to work very hard on the pitch every day."
His close relationship with the players and his better understanding of English have also helped Ancelotti to get his message across to the squad without the need to raise his voice.
"I think it is better if you can explain things, mistakes, without shouting," added Ancelotti.
"Now after one year my relationship with the players is very close, so they can understand me very well and I can understand them very well.
"If you shout all the time they do not listen."
Meanwhile, it has been revealed Chelsea rejected a bid from Marseille for striker Didier Drogba last month.
Marseille president Jean-Claude Dassier admitted he made an offer for the Ivory Coast international but Chelsea were not interested.
Drogba joined Chelsea from Marseille for £24m in 2004 after just one year in the south of France but has often hinted at making a return to the club.
"We tried to bring in Drogba, but this has not been possible," said Dassier.