Newcastle boss Steve McClaren slammed an unacceptable performance from side on Wednesday after they lost 3-0 to Everton at Goodison Park.
The Toffees had not won at home in five Premier League matches, but a first-half goal from Aaron Lennon and two late Ross Barkley penalties condemned the Magpies to back-to-back defeats.
McClaren felt his team should have taken the game to the Merseysiders, who were allowed to settle after a cagey start, and he wants a big response when West Brom visit St James' Park on Saturday.
The Tynesiders find themselves two points adrift of safety in 18th place after winning just once in the league since the turn of the year.
"Tonight we went back to what we were three or four months ago and it wasn't what we came here to do and it wasn't acceptable," he told Sky Sports.
"You could see in the first half that the Everton players and crowd were nervous and we didn't take advantage of it. We weren't positive or aggressive enough.
"Lennon's goal was a sloppy goal and gave them a lift. We changed things around in the second, where we were unfortunate to have injuries to Chancel Mbemba and Paul Dummett so we had to make changes.
"We had a go in the second half but it wasn't enough, we ought to be performing a lot better than that, fighting for each other, working for each other and playing good football.
"There were too many players below par and we need a reaction at home on Saturday, in front of 52,000 we have to perform."