Their success and that of their respective teams could be determined by the form of the players around them.
He joins Sam Byram who is also out for the rest of the campaign with an ankle issue.
The defence could revert to the Liverpool line-up as Angelo Ogbonna is set to return following illness and James Collins could be back from a hamstring strain.
Substitute Wood made it three for Sean Dyche's men, who narrowed the gap on sixth-placed Arsenal to two points and won their first away game since November. Arthur Masuaku will serve the last game of his six-match ban for spitting while Andy Carroll and Pedro Obiang missing out as well.
A throng of West Ham fans had turned their attention away from the game and onto the directors box as their side conceded second-half goals to Ashley Barnes and Chris Wood (2). Those three elite sides were the only ones to score a few times against the Clarets during that run. Barnes may be an unorthodox "number 10", however, he proved highly effective in this role last weekend and could provide real problems to West Ham's porous defence on Saturday. This is not a good atmosphere for a club to have as they enter a game. The Hammers will be back at home this weekend as they take on Burnley in a must-win game for the home team.
"Up until the goal you wouldn't have thought that it would have been such a bad day", Moyes said.
"That shows how far we have come if people think we are favourites against a big club like West Ham", said Gudmundsson.
A West Ham statement said: "West Ham United have immediately launched a full and thorough investigation into the incidents which marred the second half of today's match and are committed to taking decisive and appropriate action".
"Apart from previous year (at Sunderland), I've not really been involved too much at the bottom end of the table".
A week that had already seen a planned protest march by fans against the club's board called off as West Ham supporters' groups fell out with each other descended into chaos at the London Stadium, with stewards failing to intervene on several occasions.