Last Updated: Fri, 18 Oct 2013 14:33
West Ham will take confidence going in to their clash with Manchester City from their win at Spurs and City's own faltering away form.
Sam Allardyce led the Hammers to a 3-0 victory at White Hart Lane before the international break after deploying a formation without a recognised striker.
City are the visitors to Upton Park on Saturday evening as West Ham look to build on their London derby success and Allardyce feels there is cause for optimism given the away form of Manuel Pellegrini's side.
"In terms of results they've been a little bit Jekyll and Hyde," Allardyce said.
"[They are] absolutely fantastic at home and unfortunately for them they've not won away from home yet - lost two and drawn one.
"We have to be encouraged by that. Last year we had a fantastic 0-0 against them."
City have lost at Cardiff and Aston Villa on their Barclays Premier League travels so far this season, with their only point on the road coming in a 0-0 draw at Stoke.
West Ham had won only once in the league until their success at Tottenham and Allardyce knows his squad need to put in another top-drawer performance if they are to take three points in front of their own fans for the first time since the opening day.
"Our top level players have to play at their top level as they did against Tottenham," he added.
"Anything less would make life difficult with the quality of their squad. If our players can exploit their weaknesses like we did against Tottenham I don't think we'll win 3-0 but I hope we do."
Allardyce revealed the decision not to play a striker at Spurs stemmed from the fact none of his fit forwards had found the back of the net with great regularity.
With Andy Carroll sidelined and Carlton Cole still searching for match fitness after signing a short-term deal, Allardyce still only has Mladen Petric, Ricardo Vaz Te and Modibo Maiga to choose from.
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