Chelsea interim manager Guus Hiddink says midfielder Eden Hazard will miss at least two games for the club after picking up a groin injury against Crystal Palace.
The Belgian will miss today's FA Cup game against Scunthorpe as well as Wednesday's Premier League game against West Bromwich Albion.
Striker Loic Remy will also miss today's game with Diego Costa the only fit striker available to the Dutchman.
"[Loic] Remy is on the pitch but not with the team, he is in rehab," Hiddink told reporters on Friday.
"We have to be very cautious about our strikers. That's Diego [Costa] at the moment. Not having Remy or Falcao is worrying.
"[Eden] Hazard will not make midweek [vs West Bromwich Albion]. We must be careful because a player must not fall again after twice being injured in a physical trap. This time we must take a little bit more time.
"He was fit to play but he got an unfortunate slip in the Crystal Palace game. We must be careful to maybe [bring him back] one game or half a game later than one or half a game too early.
"It [the FA Cup] means a lot.
"If you see the impact of the FA Cup not just in England but worldwide it's a huge tradition. I remember when I was a young man specifically watching FA Cup games on a Saturday afternoon.
"When I started we said we have to have some aims - with a big club you have to set some targets. Fourth place in the Premier League is difficult, but then there are two targets left of which one is the FA Cup. It is a big target for this group of players together."