10 best signings of the summer transfer window 

#7 - Douglas Costa

Douglas Costa vs AC Chievo Verona - Serie A

Italian champions Juventus have secured the services of Bayern attacker Douglas Costa for around £35.8 million. The Serie A giants were in need of a winger of his quality, capable of operating on both flanks, which is exactly what the Brazilian had shown under Pep Guardiola.

After a disappointing second season plagued by injuries, the 26-year old decided to leave Germany. With both parties needing each other, this transfer was the perfect match. Costa found the net 6 times and provided 6 assists in 18 starts for Bayern last season, which could be a sign of good things to come.