The summer transfer window is now definitely shut (there were still deals announced on the morning after transfer deadline that were completed, but even they are gone), and no other transfer is more shocking and difficult to believe/understand than the return of Brazilian center-back David Luiz to Chelsea.
Luiz was sold by Chelsea to Paris Saint-Germain two years ago as the most expensive defender in history (€50 million), but after a couple of disappointing campaigns in France, the 29-year-old returned to the Blues in a simply stunning Deadline Day development.
Or, as our friend Dávid Pasztor from SB Nation's Chelsea blog puts it.