Chelsea manager, Enzo Maresca, has blamed a lack of control and fatigue for their 2-1 defeat to Atalanta in the Champions League on Tuesday night.
Marescas men took the lead through Joao Pedro, before the Serie A side fought back to take all three points.
Gianluca Scamaccas header levelled the game, before Charles De Ketelaere smashed in the winner in the 83rd minute.
