Max Verstappen has been warned he will not face a "walk in the park" at his home race at Zandvoort.
F1 returns from its summer break at the Dutch Grand Prix this weekend with Verstappen aiming to tie Sebastian Vettel and Alberto Ascari on nine consecutive race victories in a row.
Red Bull is undefeated so far this season having secured all 12 race victories before the break, as well as all three Sprint events thus far.
But with Verstappen on course for his third world title and returning to Zandvoort - where he is yet to experience anything other than a victory in F1 - the circuit's Sporting Director and former driver Jan Lammers has insisted a win cannot be guaranteed.
"I'm not sure of the expectation that it's going to be a walk in the park for Max," Lammers told RacingNews365.
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"I don't think it's so obvious that he's going to win with one hand on the wheel, so to speak," added Lammers.
"For Red Bull, it's still going to be hard work.
"It is a circuit with not such a long straight, while we have seen that there are other cars that with a different layout of a circuit also have very strong sides.
"This is a circuit that is very specific though, also with the banked corners, so I'm curious to see how easily they are going to dominate here.
"Of course, they are always the favourites, also in Zandvoort, but I think there could still be surprises among the other teams."