Ryan Bertrand was selected in the England squad for upcoming Euro2016 qualifiers on Thursday.
The 26-year-old left-back played his first full 90-minute match for Southampton last weekend after recovering from injury and has immediately been thrown into the international fray following the injury to Manchester United's Luke Shaw.
Despite the rapidness of his inclusion in the Three Lions setup, Saints boss Ronald Koeman felt the decision by Roy Hodgson was perfect, although a little surprising, as Bertrand is well-suited to become the country's number one in his position ahead of next summer's European Championships in France.
"Was it a surprise? A little bit because of course it's very fast after the first time playing 90 minutes," he said. "But I was also surprised about the level Ryan was at already last week.
"Maybe a little influence is some injuries to different players in that position but we know if Ryan is back and playing on his level then he's one of the national team. That's good for the player, the confidence of the player and it's good for Southampton.
"Already he's a good player in my opinion because it's always a difficult position. You don't have really very good left full-backs and the qualities of Ryan are important in our way of playing.
"I like to play with offensive left and offensive right full-backs. He's on that level that we are happy he is a Southampton player."