Chelsea head coach Mauricio Pochettino has named the team's main problem this season.
"Chelsea's problem is not that the players are so young. The problem is that the team is young. With 16-17 players who came in at the beginning of the season, it takes time to build a team," football insider Fabrizio Romano quoted Pochettino as saying.
"Chelsea has been playing erratically this season and is only 11th in the Premier League with 31 points.