FC Barcelona just officially announced the signing of French international Ousmane Dembélé from Borussia Dortmund. The 20 year old and Nike athlete signed a 5 year contract and costs 105 million Euros plus potentially add-ons of 40 million Euros. This makes him the most expensive signing in the history of Barca and the Spanish league, the most expensive player ever sold by a German club and the second most expensive signing in the history of football.