Middlesbrough beat Leeds United 3-0 in Championship action at the weekend.
The Whites were beaten 3-0 at the Riverside Stadium on Sunday, but the scoreline rather flattered the hosts, who were given a tough examination.
Leeds proved to be a dangerous opponent, and Rosler was reasonably pleased with his side's efforts - even if they weren't able to get the three points.
“The players did everything we wanted to do and the game turned out as we expected,” the German boss said to the Yorkshire Evening Pos.
“Middlesbrough don’t create many chances and they don’t need many chances with the quality of players they have.
“The first goal we helped them with and they scored. In the second half, they did not have one shot on goal [until Diego Fabbrini’s goal]. They relied on their quality and organisation. We tried everything and we tried the right way.
“I can’t blame any player. We looked like scoring in the first half and even more in the second half. This is why I’m not really frustrated.”
Leeds started the match poorly, and allowed two sloppy goals in over the first 15 minutes, as Middlesbrough showed their attacking prowess.
However, Rosler's side grew into the match and actually dominated for large stages.
The contest ultimately turned on a refereeing decision, with Mirco Antenucci controversially having a goal disallowed, after he was deemed to have been in an offside position.
If that goal had stood, Leeds would had been back in the match at 2-1, but they were ultimately punished for making a sloppy error, when a Sol Bamba slip allowed Fabbrini to round off the win.
As a result of the loss, Leeds have fallen to 14th in the Championship table.