Felix Magath has vowed to stay with Fulham despite their relegation and accepts the display in the 4-1 loss at Stoke on Saturday was unacceptable.
Magath's contract runs through next season, and he said he intends to honor it despite playing 2014-15 in the Championship.
He said on Fulham's website: "We as a team, and I include myself and management, would like to apologise for our bad performance on Saturday. It certainly was not what you as fans were expecting and should rightfully demand of us, but we were unable to perform on the day, resulting in our downfall.
"The support that you have given us has been exceptional and is much appreciated. I do realise that you have been through difficult times this season, but you have continued to be our ever faithful 12th man and I cannot praise and thank you enough.
"I was appointed by Mr Khan in February, and willingly signed a contract for 18 months, realising that there was a distinct possibility that we would not survive in the Premier League. Contrary to many opinions, I was not only brought in until the end of the season, with the primary target of keeping Fulham in the Premier League, but to build a team that can compete in the top flight.
"The reality is that we have been relegated, but my commitment and desire to Fulham remains.
"In the short space of time that I have spent here, I have been very impressed with so many aspects of our football club, and with this in mind, my one priority is to give Premier League football back to you."