Enzo Maresca was asked about Liam Delap during his post-match press conference as Chelsea assess the striker's shoulder injury over the next 48 hours.
The striker was bundled to the ground following a set-piece in the first half of Saturday's goalless draw at Bournemouth and was clearly in pain as he walked off the pitch to be substituted.
The severity of the injury will be assessed over the coming days and comes as a blow to the striker, who had already missed ten matches this season due to a hamstring injury.
In his press conference immediately after the game, Maresca said: 'Unfortunately he has already been out for two months and he has to be out again. We don't know for how long, but it looks quite bad, his shoulder.’
‘He has been unlucky,' Maresca added. 'We are also a bit unlucky because we need that kind of a No.9.’
Delap joined Chelsea from Ipswich Town early into the summer and recorded an assist on his debut during our 2-0 win over LAFC at the Club World Cup.
His first goal came against ES Tunis in our final group game and would feature in six of our seven matches as we were crowned world champions, including as a substitute during the final win over Paris Saint-Germain.
Delap featured in our first three games of the Premier League season before suffering a hamstring injury in the 2-0 win over Fulham on August 30.
He returned at the end of October and today was his sixth appearance since coming back from injury.