Chelsea head coach Mauricio Pochettino has named the team's main problem this season.
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"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.