In what was arguably the highest-profile signing of deadline day, David Luiz completed a sensational £34million return to Stamford Bridge from Paris Saint-Germain, just two years after leaving the club.
Luiz re-joins the club after the Blues signed Spanish left-back, Marcos Alonso from Fiorentina in a bid to strengthen their defence
So, how much do you know about the Brazilian that has made his way back to London? Test your knowledge with our quiz.
