The 45-year-old Borussia Dortmund boss believes that he should take the blame for the home defeat, as the club tumble to being 12 points behind Bayern Munich in the Bundesliga
The champions suffered a first home league defeat for over a year in the Revierderby against Die Konigsblauen as Ibrahim Afellay and Marco Hoger struck to put the visitors 2-0 ahead before Robert Lewandowski pulled a goal in the 55th minute.
Nevertheless, the BVB trainer has insisted the defeat is his fault, as the hosts fall a sizeable 12 points behind current league leaders Bayern Munich.
"We did not play well. I take this like [it is] my fault. I wanted to help with the upgrade of the team," Klopp told Sky Sports Germany.
"That honestly did not work so good, that one must [be looked] at."
Defender Mats Hummels was scathing in his remarks about the opposition, particularly hitting out at the time wasted by Schalke.
"I've never seen a team as sporting and fair as Schalke," the 23-year-old sarcastically jested to Bild.
"From the 10th minute of the game they were [wasting] time and faking injuries. I hope that during the season, they are not further rewarded by the referees, but are punished."
Dortmund resume Champions League action this week against Real Madrid at Signal Iduna Park.