Chelsea manager Enzo Maresca says he "trying to solve" his side's "habit" of conceding too many goals after a 2-1 defeat by a young Real Madrid side in Charlotte, in the final match of their United States tour.
First-half goals from Dani Ceballos and Brahim Diaz were enough for Madrid despite Noni Madueke's header as the Blues again looked vulnerable at the back.
They have conceded 12 goals across five pre-season games in America, going 4-0 down in two of those matches and winning just one.
Maresca said he addressed the "very high" defensive line with his players in one of his first meetings, which he said is a habit "from last season".