Leeds United head into their match against Birmingham City having lost their last match 3-0 against Middlesbrough.
Leeds lost 3-0 to Boro on Sunday, but Rosler is determined not to make any knee-jerk reactions, after what was only the side's second defeat of the season.
The German boss believes that Leeds played well at the Riverside Stadium and, having had a week without a match, is not having to rotate players due to tiredness.
"I think I'll pick the best team I can for the next game," he said, when asked whether he planned to make changes against Birmingham. "That's what I've always done. We've had a good week, having not had a midweek game, and there's no fatigue coming into it.
"The more I think about it and the more stats I see, the more it tells me how good we were between the boxes [against Middlesbrough]. However, football is often in the box, and that is where we lost the game."
Against Middlesbrough, Leeds lost because of the individual errors that they made, with Giuseppe Bellusci and Sol Bamba particularly guilty.
They actually dominated the contest for large parts, and they have added quality to the group this week.
The arrival of Will Buckley on loan from Sunderland is set to be announced on Friday, with the winger going straight into Leeds' match-day squad, according to Leeds' official website.
Rosler will be hoping that Buckley can increase Leeds' attacking threat even further, but Birmingham have been in impressive form this season.
The Blues have made positive strides under Gary Rowett's leadership and travel to Elland Road on the back of a 2-0 win over Brentford.