Jos Verstappen had admitted that his son, Max, will need "things to go his way" if he is to stop Ferrari from winning the Monaco Grand Prix.
The younger Verstappen has taken Red Bull to three wins on the bounce on his path to the top of F1's Drivers' standings in the 2022 campaign.
Following his early-season retirements, Verstappen was left over 40 points behind runaway leader Charles Leclerc. But now, for the first time in the year so far, the tables have turned.
Monaco will offer a unique challenge for all 20 drivers on the F1 grid, with the sport's new, heavier and bigger cars untested through Monte Carlo's narrow streets.
Ferrari expected to be quick in Monaco; Mercedes in the fight
But Max's father, Jos, has admitted that Red Bull have needed some good race day fortune to keep Ferrari at bay over recent weeks, and he expects the Scuderia to show considerable pace once again in Monaco.
"I expect Ferrari to be strong," Jos wrote in his column on Verstappen.com. "It will be a very interesting weekend again.
"In Barcelona, it also became clear that Mercedes has definitely made a big step forward. At the same time, the difference in the race compared to us was still four-tenths of a second.
"They still have some work to do there, but we are not sitting still either.
"Ferrari is very fast, especially in qualifying. When it comes to one lap, they have a better car. Max is very strong in the race and sometimes things have to go his way."
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Jos admits: Championship fight could swing at any moment
Red Bull have a new reliability concern heading into Monaco, with Verstappen's race win in Spain having been threatened by intermittent DRS (Drag Reduction System) problems.
"I think Red Bull has an idea where the problem with the DRS system comes from," Jos continued.
"It wasn’t really the first time. I trust they will find a solution.
"It's still a mechanical sport, anything can happen. And not only to us, as we have seen.
"I am happy that Max is leading the championship now, but it could be a different story next week."
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RacingNews365.com F1 journalists Dieter Rencken and Michael Butterworth discuss the Spanish Grand Prix, where Max Verstappen won a thrilling race after Charles Leclerc retired. But was the on-track action soured by a poor fan experience at the Circuit de Barcelona-Catalunya?