Chelsea boss Maurizio Sarri is obviously not happy with his side as he thinks they are doing badly at the back which might soon hunt them.
The Blues have had a great start this season and what is most colourful for them is that they have not been defeated in any games this season across all competitions but the manager thinks they have been lucky as a result of the blunders the defence have committed in certain games.
Chelsea will file out again against Crystal Palace having conceded just seven goals in the Premier League this season with Sarri crying out to avoid what played out between their weekend opponents and Arsenal in the previous week.
According to the manager, he has got a very good team who have the right mentality and have done better going forward but he has a major concern with the defence which to him has not been clinical enough.
The former Napoli coach stated that much work is needed to be done in the defence because many mistakes were committed at that department which he said would be dangerous to their continuity and progress.
However, the West London side are third in the Premier League table with two points behind the league leaders.