Red Bull boss Christian Horner has been beaming about Daniel Ricciardo and Max Verstappen ahead of the new Formula 1 season.
The pair finished third and fifth in the World Drivers' Championship standings in 2016, and Horner believes they will continue to push each other all the way over the course of 2017.
"We've probably got absolutely the most exciting driver pairing on the grid," Horner said.
"It's so exciting to see the development and the evolution of Max as he's gaining in experience confidence and age, at the heady age of 19!
"Daniel for me was the driver of the year last year, he put in some phenomenal performances, he's right at the top of his game, his confidence is high.
"I think the dynamic between the drivers is great, they're going to push each other incredibly hard, which is great from a team perspective.
"I couldn't wish for two better more motivated drivers in our cars."
Horner also compared their relationship to that of an older and younger brother, who he ranks as the best overtakers in the business.
"They're both ferocious racers," Horner added.
"The race craft on a Sunday afternoon: I don't think there are any drivers out there who are better overtakers than our two guys.
"They're tremendously dedicated, enjoying what they do, they revel in being Grand Prix drivers, having fun along the way.
"There's sort of a big brother, little brother mentality going on, they live in the same apartment block.
"It's a great pairing for us to have."