Striker Rickie Lambert has written a letter to Southampton fans thanking them for their support during his time at the club.
The Three Lions boss has largely rewarded Premier League form in a youthful-looking squad for the tournament in Brazil. See the full squad:
A disappointing afternoon for Southampton in their Premier League clash with Manchester City.
Delighted to have signed for @manutd ! Looking forward to the future, thank you to all the fans for your nice messages ?
Saints say Shaw will 'carry forward our top-class pedigree' as his completes his move to Manchester United.
Southampton Football Club released a statement on their website this afternoon.
– Executive Director Les Reed
While we are sad to see Luke depart the club, we fought to ensure that we got the right deal for a player in whom we have invested a great deal of work over the past decade. Luke joined us at the age of eight, and our academy staff and coaches have helped him to progress into a top-class player. He will leave our club and carry forward our top-class pedigree, as others have done before. This deal is a good one for Southampton Football Club, and hopefully sends a clear message to other clubs wishing to bid for our players.”
Les Reed: “We fought to ensure that we got the right deal for a player in whom we have invested a great deal of work over the past decade.”
More from @lukeshaw3: "I'm looking forward to this new chapter in my life & learning from the world-class players & management at the club."
Luke Shaw 's Twitter profile says he is a Manchester United player despite no official announcement from the club.
However, a short time ago he changed his profile back and removed any mention of Manchester United.
Luke Shaw has completed his move to Manchester United from Southampton, PressAssociation Sport understands.
The latest fixture list for Southampton Football Club has been released.
The first match of the 2014/15 season for the Premiership Club is away to Liverpool on Saturday 16th August.
Their first home game will be on Saturday 23rd August to West Bromwich Albion.
The team will also be away to Crystal Palace on Boxing Day.
The last game of the season will be away to Manchester City on Sunday 24th May 2015.