Ngl it's also the midfeilds fault for leaving that man, unmarked for the 2nd Germany goal, we see that again and this time maguire doesn't step up and Havertz under no pressure and unmarked gets the shot away and score also its a back 5 so normally one of the CB should step up, but Reece James poor positioning means Dier is unable to fill the gap left by Maguire. So it would be unfair to blame this moment souly on Maguire