Slaven Bilic believes West Ham's thrilling Carabao Cup fightback against Tottenham can breathe life into their faltering season.
Spurs looked set to pile more misery on Bilic when Dele Alli and Moussa Sissoko gave the home side a two-goal lead at Wembley.
But West Ham came storming back in the second half as Andre Ayew scored twice and Angelo Ogbonna headed in for an unlikely 3-2 victory.
After losing 3-0 at home to Brighton last Friday, Bilic admitted before the game this was another "do-or-die'' week for his side, who sit 16th in the Premier League table.
They now face a crunch match on Saturday away to fellow strugglers Crystal Palace and Bilic hopes this victory can spark a revival.
"It can give us a lot of confidence, but only to do the same in training, to do the same on Friday, on Saturday,'' said Hammers boss Bilic.
"We have to use this opportunity to work hard. We have two days before Palace, it's not ideal but the win gives you energy, gives you freshness.
"Now tomorrow at the training ground nobody is going to feel tired, from the impact of our result, from beating them.''
West Ham lacked confidence and purpose in the first half against their London rivals but Ayew twice took advantage of poor defending to pull his side level.
Bilic said his players have now set the standard they must maintain.
"Other than Brighton, we improved a lot in the last six games,'' Bilic said. "This should be the standard for us in terms of closing down, in terms of sacrificing for the team.
"Some games we may lose, but I am quite positive we are improving.''