Max Verstappen disagrees with Sergio Perez's claims that Renault's engine is now on a par with Mercedes' power unit.
Verstappen captured Red Bull Racing's only podium to date this season when he finished third in China, but isn't sure his team's engine a partner has caught up with its German counterpart.
"Of course they (Renault) are working really hard," he said.
"We're also working really hard to improve the car. But I think there is still quite a deficit. So we need to continue working hard together to make it better in the upcoming races."
The young Dutchman said Mercedes still held an advantage, mainly in qualifying.
"Mercedes has a mode where they can turn it up," he said.
"In the race they cannot use it as much because you can't run the engine like that the whole race. That's why it looks better in the race but from our side, it's more or less the same.
"We don't have this massive power mode [for qualifying]."
GALLERY: All the pictures from Thursday in Sochi
Keep up to date with all the F1 news via Facebook and Twitter
It's been a long time in coming but Lando Norris finally clinched his maiden Grand…
Williams driver Logan Sargeant is maintaining his composure amid speculation regarding a potential mid-season replacement,…
Lando Norris says Miami isn’t the best circuit to gauge the full impact of McLaren’s…
Red Bull managing director Oliver Mintzlaff has for the very first time publicly expressed his…
Fernando Alonso says he’ll be looking to engage with the FIA regarding his concerns over…
On this day in 1985, the San Marino Grand Prix ended in confusion with drivers…