Liverpool boss Brendan Rodgers insists his 3-5-2 system best suits his players.
With injury leaving full-backs Aly Cissokho and Glen Johnson on the sidelines in recent weeks, the manager utilised different formations during September, including a set-up with three central defenders.
"It will depend on the players that are available," Rodgers told liverpoolfc.com.
"When we tried it last year, we looked at it in training and then played it in a couple of games. But you have to see it under pressure and have to see where you need to adapt things.
"The players have carried it out really well in the last couple of games. It can be a system that works for us; but what doesn't change is our idea of the game, how we want to pass, how we want to be aggressive in our attack.
"It gives us numbers going forward, which is important. It's another system that the players have shown we can play. With more play and more development, it's one that we can flip to quite easily.
"It's wherever you can get superiority in the game. If I look at Daniel and Luis Suarez, they are both nine-and-a-halves. They are not straight up and down strikers, they like to move and get in between.
"The game is evolving all the time; as a coach you are always looking at your players. The style never changes. I've always asked teams to control and dominate the ball, be aggressive in your defending, and press really aggressively and high up the pitch - but that can be in whatever system."
