Barcelona FC have confirmed the signing of Borussia Dortmund forward Ousmane Dembele for a deal that could reach 147 million euros (about $173 million), making it the second most expensive transfer deal in football history after Neymar’s move to Paris Saint-Germain earlier this year.Barcelona said on Friday the 20-year-old Dembele will be officially introduced after undergoing a physical and signing his contract on Monday. But the club has already welcomed his arrival on their social media accounts.??? Benvingut @Dembouz!??? Bienvenido Dembl!??? Welcome Dembl!??? Bienvenue Dembl!????´ #BeBara pic.twitter.com/gTl0YXCEd6- FC Barcelona (@FCBarcelona) August 25, 2017The club will pay 105 million euros ($124 million) plus possible add-ons that could reach 40 percent of the fixed transfer fee.France international Dembele scored 10 goals and provided 21 assists in all competitions to help Dortmund finish third in the Bundesliga last season. The team also won the German Cup.Dembele’s contract will have a buyout clause of 400 million euros ($472 million).Barcelona is bringing in Dembele to try to boost its attack following the departure of Neymar, who moved to Paris Saint-Germain in a world record transfer worth 222 million euros ($264 million) just before the start of the season.