Earlier this week, Chelsea finally announced the £32 million signing of Atletico Madrid striker Diego Costa. Costa arrives on a five-year deal worth a reported £150,000-a-week and becomes the London clubs third major signing of the summer, following Cesc Fabregas and Mario Pasalic. Blues boss Jose Mourinho had been looking for a killer striker this summer after watching his strike force of Fernando Torres, Samuel Etoo and Demba Ba struggle last season, and Costa looks as though he fits that criterion having netted 36 goals in 52 games in 2013-14. Costa said he was very happy to join Chelsea and that he was excited about getting his playing career up and running in England following his four-year spell in the Spanish capital with Atletico. And as we prepare to acquaint ourselves with the Brazilian forward, how much do we know of Costa so far? Aside from being a prolific goalscorer, earning rave reviews on the pitch, hes also courted controversy off it by switching his nationality and being embroiled in a series of disciplinary set-backs. To find out more, including which Barcelona legend he matched in last seasons goal-scoring charts, read on as we take you through 9 things you need to know about Diego Costa.