Attacking midfielder Oscar says manager Antonio Conte can deploy two formations at Chelsea this season.
The Blues manager deployed the 4-3-3 and 4-2-4 formations in pre-season friendlies so far this summer.
The Brazilian says he was more comfortable with the 4-3-3 formation as he was again on target in Chelsea's 4-2 win against Werder Bremen on Sunday.
"We like to play together," Oscar told the club's official website.
"Every time when we have the ball we come close together to try and link up and create something. This is good for the team and for us.
"4-2 was a bit low I think, we played much better than Werder Bremen and we deserved to score more goals. We missed a lot of chances but it was good because the team created a lot. Everyone played very well.
"I think we have played better with the 4-3-3 than when we have played 4-2-4, but we have two formations and always we try our best.
"I like playing in a 4-3-3 because I can score more goals, and also create more and tackle in midfield which I like to do to help the team.
"In the last two games I have scored three goals so I am feeling good, we are ready and now we are all just looking forward to starting the season."