Chelsea have been rocked by the news that Portuguese duo Ricardo Carvalho and Deco both face spells on the sidelines.
Deco, who missed Sunday's 1-1 draw with Manchester United at Stamford Bridge, has a tear in an upper thigh muscle and will be out for approximately two weeks.
Carvalho started the game against Sir Alex Ferguson's side but had to be substituted after only 11 minutes
The central defender had a scan on Monday that showed he had strained a medial collateral ligament in his knee which could keep him out of action for up to a month.
Meanwhile, Sunday's goalscoring hero, Salomon Kalou, insists he always thought the Blues would not lose against United.
The striker came off the substitute's bench to head Chelsea's late equaliser after Ji-Sung Park had fired United into a first-half lead.
Kalou told Chelsea's official website: "It was a good cross from John Obi Mikel and the defence was playing an offside line, but fortunately I wasn't offside, so it was a good point for us.
"It's my first goal against Manchester United, so I hope it is the start of a lot of goals and it has given me a lot of confidence. It is a good feeling to come off the bench and score because it is one of my important goals.
"I wasn't worried because I have seen Chelsea come out from difficult games and make the difference. They tried to play and it was difficult for us, but in the second half we came back well and it was difficult for them so they tried to play with a lot of contact.
"But when you play against Manchester United and they are winning 1-0, you have to make the difference in the last few minutes.
"If you watch the game, then it is not a bad result. They could have even won the game, so to come back into the game is a good result."