Manager Luiz Felipe Scolari admitted that the the 3-0 defeat to Manchester United had undermined Chelsea’s title challenge.
Suffering a first away league defeat this season on Sunday, the Blues were outplayed at Old Trafford.
“I think it has done some very big damage because we didn’t come here to play like this,” Scolari said.
“But don’t think if we lose one game we are finished. We have 17 games left and we will fight to the last.”
Chelsea failed to register a single shot on target and with an FA Cup replay at Southend on Wednesday, their form is a huge concern for Scolari.
“You never know what will happen but if we play like we did today for the next three or four games we will not win,” the 60-year-old Brazilian added.
“But now is the time for me and the players to think about the future. We can lose everything or we can be men and we can improve.
“Manchester United were better than us. We were thinking about winning the game.
“Our performance for the first 45 minutes was very well but then we conceded a goal and that changes the game.
“After this goal they could play more freely. We tried to put more players in front and we give them the space they want to play.
“Now we need to think about the result, what happened to some players, what happened from set-plays and now we have to think about the future.”
Despite his side’s poor form and having recently sold defender Wayne Bridge to Manchester City, Scolari confirmed that he had not intention of strenghtening his squad in the January transfer window.
“We don’t need more players,” he said. “I don’t think they will arrive and I don’t want them anyway. This is my squad and I will improve them.”