The Magpies travel to Manchester this weekend hoping to build on their draw with Chelsea.
Few anticipated anything other than a Chelsea win at St James' Park last weekend, but Steve McClaren’s men had other ideas and would have grabbed all three points were it not for a late Blues fight back.
Janmaat is confident of getting a positive result in Manchester - but only if the standards from the Chelsea game are maintained.
“If we play in the same way that we did against Chelsea, then I don’t think anyone would be wanting to play Newcastle, including City,” he said, in quotes published by the Sunderland Echo.
“City started the season brilliantly, but maybe they are struggling a little bit more at the moment. They got beat a couple of weeks ago, and then they lost again against Tottenham.
“We know they are still a very good side, but we have to have the belief that we can do something there. If we have that belief, and play in the same way that we did against Chelsea, then I’m sure we can get a good result,” he added.
City’s form has dipped recently, after an imperious start to the season, and the first traces of doubt may start to creep into the mind of Manuel Pellegrini’s men.
Newcastle’s task will be made all the more difficult, however, by the return of Joe Hart, Vincent Kompany and David Silva, but the Citizens’ midweek commitments in the Champions League could prove a distraction.
They face-off against Borussia Monchengladbach on Wednesday night, hoping to react to defeat in their first group game, and their European exertions should give Newcastle the edge in terms of freshness.