Southampton have signed Netherlands midfielder Jordy Clasie from Feyenoord for a fee in the region of £8m.
Clasie, who has agreed a five-year deal with the Premier League club, worked under Saints boss Ronald Koeman at Feyenoord, where he played 129 games.
The 24-year-old has 11 caps for his country and was part of the squad that finished third at the 2014 World Cup.
"It's a big club playing in what I think is the biggest and most important league," he said.
Clasie is Southampton's fifth signing of the summer and it comes two days after midfielder Morgan Schneiderlin's £25m move to Manchester United.
Saints executive director of football Les Reed said: "Jordy is one of the most highly sought after midfielders in Europe.
"His qualities are plain to see for anybody who has watched his development over the past few years as closely as we have.
"We are delighted he will continue his growth at Southampton."
Clasie joins Juanmi, Cuco Martina, Cedric Soares and Maarten Stekelenburg in making a summer switch to St Mary's.
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