Saints complete French swoop
By Graeme Bailey
Last Updated: 01/01/70 1:00am
The 20-year-old striker impressed on a recent trial at St Mary's and Saints manager Gordon Strachan has now agreed a deal with the player's club Metz.
Hassli will move to England on loan until the end of the season, with a an option to make the move permanent.
"This is a big opportunity for me but I am very happy to have the chance to prove myself," said a delighted Hassli.
"I want to do enough to earn a permanent contract.
"I like what I have seen of the club and the city. I know the players a bit more now and they have made me very welcome.
"There is a good spirit here and I like the English game. I like the passion and the power and the physical style.
Strachan was pleased to have concluded the deal, saying: "He has great feet and a good touch for a big man.
"He is well-built and powerful, not the quickest but intelligent.
"He is a good footballer and only 20, so we can work with him," the Scot told Southampton's official website.