Amadou Sakho has joined Southampton for an undisclosed fee and is expected to become the first player from a Premier League club to join a top flight team.
Sakho has spent the last five years with Saints, but he was only in the first team during the recent season, so he will be expected to start on the bench.
“I want to show my best and make a name for myself,” said Sakho, who will be playing for the first time in England in the Premier League.
“We’re going to take a lot of pride in the way we play, the quality of the players, and how the team looks.”
Sakko, 26, was signed from Porto in the summer of 2013 for a club-record £20m.
His arrival will come as a surprise to many Southampton fans, given the club has struggled to win trophies since the sacking of Ronald Koeman in November 2015.
The Portuguese manager has only managed two Premier League titles in five seasons and lost his job in the winter.
However, his side have won only twice in the league since.
Saghioune was an unused substitute in the 4-0 win over Stoke on Saturday, but was called upon to make three changes against West Brom on Wednesday, when he made seven tackles and one interception.
“He’s an important player and will play a major role,” Saints boss Claude Puel told reporters.
“I don’t know if he will start, but I expect him to play.”
Southampton will play their opening game in the Europa League on Thursday night at home to Fenerbahce.