Roma have signed defender Mario Rui from Empoli on a one-year loan deal.
The Stadio Olimpico side have stumped up an initial €3million fee for the 25-year-old, potentially rising to €4.5m depending on performance-related bonuses.
Roma are also obligated to make the deal permanent for €6m if Mario Rui hits other performance-related objectives.
"I've joined one of the best clubs in the world so I'm feeling great," the left-back commented on his move.
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"The first impressions are very positive. I hope to contribute and help the team to build on the work they did last season.
"It was always very tough to play against Roma because it felt like they were running at double speed.
"It speaks volumes when the great players Roma have put that effort in, it's impressive."
Mario Rui started his career at Sporting Lisbon before going on to play for the likes of Valencia and Benfica prior to joining Empoli in 2013.
He has also represented Fatima, Parma, Gubbia and Spezia.