Dec 10 (Reuters) - Chelsea manager Enzo Maresca was disappointed by how his side conceded two second-half goals to throw away their lead and slump to a 2-1 Champions League defeat at Atalanta on Tuesday.

Joao Pedro broke the deadlock for Chelsea after 25 minutes, but Serie A side Atalanta returned with far more intent after the break and overturned the deficit through goals from Gianluca Scamacca and Charles De Ketelaere.