Antonio Conte believes Chelsea’s loss of concentration was detrimental as they lost 2-1 to Liverpool.
The blues were not all too active in the first half and fell behind by two goals, with Lovren connecting with a Coutinho freekick.
Henderson doubled the lead with a sensational strike, before Costa scored the lone goal for Chelsea.
Chelsea had to come from behind to draw 2-2 with Swansea City last time out, and Conte, who suffered his first defeat since taking over the club, admitted his team are too often guilty of complacency.
“To find a reason [for defeat] sometimes is easy, sometimes hard. The goals we concede are strange. We must feel the danger and today we didn’t,” he told Sky Sports.
“We have to reflect a lot on this game because it is important to understand the situation if we don’t want to repeat another bad season like last season. We don’t feel the danger, never.
“In the second half, the approach was better, and we scored the goal – another through Costa – but in the end it’s a pity.
“We played without intensity and you must pay attention to details if you want to play like a great team. Chelsea are a great team but we sometimes don’t pay enough attention.
“With Liverpool when you concede space it’s very difficult – they have three fast strikers all with good technique.
“At this level it’s important to pay attention to the details.”