Irish defender Jake O'Brien scored a late equaliser to earn Everton a 1-1 draw at West Ham and extend their unbeaten run in the Premier League to nine games.
The Toffees were not awarded a penalty late in the first half following a VAR check and the Hammers took advantage by scoring through Tomas Soucek midway through the second half.
The Toffees looked set to lose but right-back O'Brien scored his second goal in three games in the 90th minute to give David Moyes a point against his former side.
Carlos Alcaraz returned to the Everton starting line-up and Graham Potter made three changes to the side that lost to Newcastle on Monday, adding Lucas Paqueta, Konstantinos Mavropanos and Emerson.
Everton started brightly but West Ham almost opened the scoring on 13 minutes when Jarrod Bowen headed at Jarrod Branthwaite and Jordan Pickford saved.
O'Brien and Jack Harrison exploited the space on the right but failed to create a clear-cut goal chance, while Vitaliy Mykolenko's cross from the other flank went just wide of Beto's goal.
Pickford was brought into action again on 28 minutes when Max Kilman, breaking towards the West Ham goal, found Bowen on the edge of the area.
The England forward fired home a volley and Pickford was able to tip the ball over the crossbar.
Five minutes later, Alphonse Areola was forced to make his first significant save when another attack down the right flank resulted in O'Brien's powerful 20-yard strike being saved by the Hammers keeper.
Everton had cause to celebrate a minute before the break when Beto went down under pressure from Mavropanos and Kilman and referee Darren Bond awarded a penalty.
However, he was directed to a touchline monitor and quickly changed his mind as replays showed no real contact with the Everton striker.
Bond left the pitch to boos from the home crowd and Everton struggled to find rhythm in the second half as the visitors looked the more dangerous.
In the 67th minute, Soucek put West Ham ahead when he intercepted the ball from Bowen on the right edge of the penalty area, turned sharply and fired past Pickford into the bottom corner of the goal.
Bowen then tested Pickford again as Potter's side looked to double their lead before the hosts were finally able to apply some pressure.
Youssef Chermiti, coming on as a substitute on his first appearance of the season, had a shot blocked and the young striker was also involved in the goal that levelled the scores.
Chermiti's shot was saved by Areola but Alcaraz picked up the ball and crossed it to the other side of the box where Idrissa Gueye's first cross was headed in by O'Brien.
Everton could have snatched three points but Alcaraz fired just wide from 12 yards.
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