Official: Dortmund signs with Bundesliga top defender

German club, Borussia Dortmund has made very good  transfer, they have strengthen their defensive line with one of the best Bundesliga defender.

Turkish star, Omer Toprak has officially signed a contract with Dortmund.Toprak was a key player of the Leverkusen defense, but he has accepted the transfer to Dortmund.Dortmund will pay 12 million euros to Leverkusen, while Toprak will join them in the summer.27-year-old has signed a contract for the next five years with Dortmund.