Antonio Conte is rapidly losing his battle to prove that Chelsea are not the only team that can win the title this season.
West Ham are one of only two teams to beat Chelsea since Conte's decision to switch to a 3-4-3 formation in late September, and he has primed his players for another hard challenge as they bid to restore a 10-point lead at the top of the Premier League.
Chelsea, who saw their lead at the top of the Premier League cut to seven points after Tottenham beat Everton on Sunday, have no other injury concerns.
"We will try our best to win games".
West Ham manager Slaven Bilic has lauded Moses, who has played most of his career as an attacking wideman, for the ease with which he has adapted to his new role.
The midfielder was a crucial performer in Jose Mourinho's title-winning team two seasons ago, where the Blues landed the title by eight points ahead of Manchester City.
Unlike in that match, they are set to field a full-strength team, with Eden Hazard expected to have recovered from a knock. They know if they get the points they have a chance.
A big boost for Bilić is the reported return to fitness for Andy Carroll.
Many will not be backing West Ham for victory on Monday, but having already defeated the same opponents in the EFL Cup this season there will be some confidence. When I was a footballer, I played only for two teams: Lecce and Juventus.
Despite the slight confidence, Hammers should have going into this fixture, I feel that Chelsea will be too much to handle for them.
"But the reason we have turned things around is that we didn't stop believing. It can be a really tough game", Chelsea's official website quoted Conte as saying.
"I think [Diego] Costa is brilliant but he's not better than Didier Drogba", Wright said on BT Sport [via Metro].