Southampton academy graduate Sam McQueen has signed a new four-year-deal.
The 21-year-old, who made his Premier League debut in the Saints' 3-1 win over Burnley in October, will remain at the club until 2021.
"It feels really good, as you'd expect," the left-back told the club's official website. "I'm delighted to sign a new deal with the club, having been here for so long already.
"It has been years and years of hard work to get to this point. I'm really happy to be out on the pitch playing games for the first team.
"The last couple of months have been amazing for me and this new contract really just rounds that off. Now it's important that I keep working hard and make as much of an impression as I can."
Executive director of football Les Reed added: "We've been delighted with the way in which Sam has developed in recent months, becoming an important part of Claude Puel's first-team squad."
McQueen made his first-team debut for the Saints in 2014 before a loan spell at Southend during the second half of last season.
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Southampton manager Claude Puel believes former boss Ronald Koeman deserves respect when he returns to St Mary's Stadium on Sunday.
The Dutchman is unsure of what reception will await him when he heads to the south coast for the first time since leaving the club to take over at Everton in the summer.
Koeman was the subject of some supporters' ire when he decided not to honour the third year of his contract, having finished seventh and sixth in his two seasons since replacing Mauricio Pochettino.
Frenchman Puel, though, wants everyone to focus on delivering the required performance rather than proving a point to their former boss.
Puel said at a press conference:
I think he did very good at Southampton last season, to get the players to be able to (qualify) for playing European games. I have a lot of respect for his work.
I saw him when I was a trainer at Lyon and he was coaching in Europe, he is a good trainer. Of course it should be a positive reaction for the players to see their former trainers.
For the fans it is important to respect also all of his work here and to now be behind their team.
Pierre-Emile Hojbjerg has played against the big boys of the Bundesliga and some of the top teams in the Premier League - but the Southampton midfielder has named Jurgen Klopp's Liverpool as the best side he has ever come up against.
Saints held Liverpool to a goalless draw on Saturday as Klopp's attacking talent all suffered an off-day, missing a number of decent chances to keep the Reds clear at the top of the Premier League.
The 21-year-old Denmark international, who signed from Bayern Munich in the summer, paid Klopp's side the biggest compliment following the stalemate.
I played in Germany against Bayern Munich and Dortmund, I played against Manchester City in the Champions League, but I must say this is maybe the best team I have ever played against.
It's not only that they move the ball quickly. They also have fast players, and with the ball they are very good one against one.
It's unbelievable how they move, how they stand, how they work together - it's like a symphony.
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