Ronald Koeman says an ability to play a number of different systems is a huge positive for Southampton.
Saints have adopted a three-man defence in the last three matches, winning against both Watford and West Bromwich Albion in the Barclays Premier League.
And Koeman believes the opportunity to adapt their formation leaves opponents unsure as to how Saints will approach each game.
Asked about a permanent switch to three defenders, Koeman said: “That’s a possibility, because sometimes when we play 11 against 11 I like to play out of a different system.
“I think a really good team can play different systems if you have those kind of players and we have that. I don’t go crazy and change every weekend.
“We know that and we have training sessions to do that. That’s good, because we know how to play different systems.
“That makes it so much more difficult for the opponents to know what they can expect.”
The formation switch has seen Ryan Bertrand and Matt Targett link up on the left-hand side, and Koeman has been delighted with the way the duo have adapted to the changes.
“I put Ryan in that position in the last two games because then I have really a left foot when we like to build up,” Koeman said.
“I was very happy with the way how Targett trained and played in the under-21s. He’s a young player and it’s difficult for him, because in front of him is an English international player.
“Ryan can play out of that position because he is learning, he is developing, he’s older, more experienced and in my opinion is a good defender.
“One of his best qualities is playing from the back and he has really a good left foot on that side and that’s important to have.”