Roma have completed the signing of Empoli defender Mario Rui.

Rui is technically arriving on loan, but the option to buy is mandatory after a certain number of appearances.

“AS Roma is delighted to confirm the signing of Mario Rui Silva Duarte," read a statement.

“Roma announce that terms have been agreed with Empoli FC for the player to join the club on loan until 30 June 2017.

“Roma will pay Empoli a fixed fee of €3 million, rising by up to €1.5 m in performance-related bonuses.

“The agreement includes a performance-related clause which, if triggered, will mean Roma must make the deal permanent by the start of the 2017-18 season for a fee of €6m."