West Ham striker Marko Arnautovic admits their four consecutive defeats is "unacceptable".
West Ham have only once lost their opening four league matches of a season, in 2010-11 under Avram Grant - when they were relegated.
"It is hard to talk after this type of game," said Arnautovic after defeat to Wolves. "They dominated in the first half.
"I think we came into the game in the second half, and created chances. We had better possession but, in the end, results like this cannot happen.
"That's football, but it's a very hard situation. I know what the players feel and that the club and the fans are expecting much more from us, but we need to stick together, hold together, and believe in each other.
"We need to get confidence to turn things around. Everyone believes in each other but that was unacceptable. We need to pick up as soon as possible.
"We know our squad. I know we have good players and we have quality, but we need to show this. On paper, it's nice to see, but on the field, it isn't happening like we want, and we need to pick it up.
"Now we've got this international break and we have to try and train as hard as possible and come back together to play the next game."