Sebastian Vettel is prepared for a resurgence from Red Bull as they plan to unleash their b-spec car at the Spanish Grand Prix.
Many expected Red Bull to profit the most under the new aerodynamic regulations but they have been performing below-par since the start of the season.
Three retirements this season has seen the team fall nearly 80 points behind Mercedes and Ferrari in the Constructors' Championship, while the RB13 has not had the pace to keep up with the leading duo.
But Vettel is expecting his former team to show signs of vast improvement when they arrive in Spain with their big upgrade package.
"There's a lot of rumours around," said Vettel. "They are a strong team, they know how to build a quick car so I expect it's a question of when rather than if."
Daniel Ricciardo, meanwhile, is hoping for a much faster car after keeping a close eye on what Mercedes and Ferrari have brought in to the 2017 season.
"I hope for a bit of bullet – something fast," said Ricciardo. "We want to be in a three-way fight.
"We've had a bit of time to look at Ferrari, and they look strong, and the Mercedes, and they look like they are stronger at the rear.
"I'm confident it's going to be better than how it is now. If it puts us within half a second then we are in striking range after that."