Following a summer of heavy investment, Andre Villas-Boas's new-look Spurs have made a fine start to the campaign, taking 13 points from six games.
Their impressive form has lead to suggestions that they have the potential to challenge for their first league title since 1961.
However, Holtby is adamant that a top-four finish is what everybody is focused on at White Hart Lane.
"Everyone can dream but our main aim is to get Champions League football," he told reporters.
"I think we've got the quality and the ability in the whole squad to do that, I'm very confident. It's a long season and everyone has to be at the top level to reach that."
Holtby has made 23 first-team appearances since joining Spurs from Schalke 04 in January.