Monaco have signed Brazilian defender Jemerson from Atletico Mineiro.
The 23-year-old has signed a five-year contract with the principality side after the two clubs agreed a fee reported to be in the region of €10 million (£7.6m).
Jemerson, who has been given the No. 5 shirt, told his new club's official website: "I am very proud to sign for AS Monaco. This is a big club where a lot of great players have come through, and I'll be doing all I can to be one of them.
"I want to help the team achieve its objectives as quickly as possible, especially Champions League qualification. I intend to give my all for the AS Monaco shirt.''
Club vice-president Vadim Vasilyev added: "We are very proud to welcome Jemerson, a young Brazilian defender whom we have been tracking regularly. We have a lot of faith in him. He will have the opportunity to develop at AS Monaco, and we are sure he will soon be showing all of his qualities.''
Jemerson's arrival could be timely for Leonardo Jardim's side after they conceded three goals in Saturday's defeat to Angers. Monaco face Bastia on Tuesday and in-form Nice next weekend.
- AS MONACO (@AS_Monaco) January 31, 2016
Compatriot and fellow defender Fabinho said after the Angers match: "Even though we were good in some periods, we lacked fight. Angers were more aggressive, that is why they won.
"Now, we have two big matches. There is no time to cry or to dwell on it. It's good for us that the games against Bastia and Nice come quickly. We want to get back to it.''