Southampton have signed Scotland international Stuart Armstrong from Celtic on a four-year deal for a reported £7 million.
The midfielder was beset by injuries last season, one year after scoring 17 goals.
He is the Premier League club's first signing of the summer.
"Southampton seems a really good fit for me," Armstrong said in a statement. "Watching from afar, I really enjoy the attractive football that they play and I'm very happy to be here."
Southampton narrowly avoided relegation last...
Celtic manager Brendan Rodgers has backed Stuart Armstrong to make his mark in central midfield for club and country.
Armstrong started and scored in Celtic's 4-0 victory over Ross County on Wednesday night as one of two central midfielders behind an attacking four, after impressing off the bench during Sunday's cup win over Rangers.
Rodgers admitted he has worked on the 24-year-old's confidence and tactical knowledge since arriving in the summer ahead of the midfielder's second full season at Parkhead.