Argentina left-back Fabian Monzon has joined Lyon on a four-year contract in a deal that saw French forward Jeremy Pied move in the opposite direction to join Nice.
Lyon announced the deal on Sunday evening, revealing that it had paid Nice three million euros ($3.61 million), potentially rising to four million euros ($4.82 million) with bonuses.
Pied, 23, joined Nice for three million euros, meaning that the only money that will change hands between the clubs will be for any bonus payments that Lyon has to make as part of the terms of the Monzon deal.
Monzon, 25, arrived in France last season and scored eight goals in 34 matches in his debut campaign with Nice.
The seven-cap Argentina international had previously played for Boca Juniors, his formative club, and Spanish side Real Betis, where he spent the 2008-2009 season on loan.
Monzon is likely to take the place of French left-back Aly Cissokho, who is reportedly poised to join Valencia from Lyon in a six million euros ($7.22 million) deal.
Long-serving Brisbane Roar midfielder Massimo Murdocca has been granted a release to return to his family in the Victorian capital and link up with Melbourne Heart.