West Ham boss Slaven Bilic has three games to save his job.
The Hammers have suffered a difficult start to life at the London Stadium.
Bilic's men continued their poor run of form with a 3-0 home defeat to Southampton on Sunday.
“If there wasn't a win after these three games the decision would have to be made," a source said. “He is set to get players back and that will help a lot. Draws won't be good enough for him though.
“But you can't go on losing game after game without having to make a big decision.
“We cannot be in a position by Christmas where we are playing a serious catch up game."