With Max Verstappen getting the better of Daniel Ricciardo at Silverstone, Martin Brundle reckons there are "fireworks" on the horizon.
Verstappen is the only Red Bull racer to have won a grand prix this season as he triumphed on debut in Spain.
But while the Dutchman has shown great race craft, it is Ricciardo who has led the way in qualifying.
That, though, came to an end at Silverstone.
Verstappen pipped his team-mate to third on the grid and followed that up with a podium finish in Sunday's 52-lap race.
"Max Verstappen was my driver of the day," Brundle told Sky Sports F1. "In challenging conditions he gave Mercedes a run for their money.
"He's so remarkably mature for his age, it's as if he's 28 and not 18. His race craft, his pit-stop choices and his wheel-to-wheel combat were outstanding.
"I still think the team should have given him fresh tyres to make a charge at Mercedes over the last few laps and prevent Hamilton from babysitting his engine. They had nothing to lose.
"On Saturday we also saw Max out-qualify Daniel Ricciardo for the first time. Daniel has a challenge on his hands, but it's a challenge which I believe he is more than up to.
"He has all the tools he needs for a fight with Max, and that will mean more fireworks for us to enjoy."