Yan Valery signs new Southampton contract
The 20-year-old right-back has become a regular starter under Ralph Hasenhuttl and made his top-flight debut against Manchester United in January.
Valery, who can also operate as a midfielder, has gone on to make 16 Premier League games this season, scoring in his last two against United and Tottenham.
"Yan's development has been fantastic in the last few months," Hasenhuttl said. "I think he is a player who embodies precisely the philosophy of Southampton, as he is young and forward-thinking.
"He has been given trust by us, and in return he has shown exactly what we want to see, which is a brave player who believes in himself and is willing to work on his deficits to get better.
"Already you can see Yan has improved defensively, and his goals against teams like Manchester United and Tottenham are big signs of how much his confidence has been growing."