Aaron Cresswell says West Ham United supporters were right to boo after Saturday's loss to Newcastle United.
Despite a spirited fight-back in which they brought the scores to 3-2, the Hammers were eventually beaten at London Stadium.
"It was understandable the way they reacted," Cresswell told the Standard. "There is no beating around the bush, [our performance] was not good enough. We have got to put it right. We are not in a panic situation, but considering the start to the season we had, it was frustrating that we have not kicked on.
"To be 3-0 down at home against Newcastle is not good enough. We are going through a tough period at the moment. We have got to stick together and get through it. We have got to get back to what we were doing at the start of the season."