The official statement from the Serie A side read: "AS Roma is pleased to announce the signing of Mats Hummels. Born in 1988, the German is a central defender with enormous international experience. He has over 600 appearances in all competitions, national and international, 78 games with his own national team, as well as 16 titles won between club and national team, including the 2014 World Cup.
"During his career he wore the shirts of Borussia Dortmund (in two periods of time) and Bayern Munich. He chose the number 15 shirt, he is the seventh German footballer in the history of the Giallorossi. Welcome to Rome, Mats!"