With plenty of focus on Red Bull Racing's new partnership with Honda, Verstappen finished Free Practice 1 for the 2019 Australian Grand Prix an encouraging fourth, less than two tenths-of-a-second adrift of pace-setter Lewis Hamilton.More news: Mueller says former Trump campaign official still helping 'several ongoing investigations'
"Mercedes looked quick in that second session, the times that both their drivers turned out looked pretty quick", Horner told Sky Sports.
Speaking to AS newspaper, the Finn said, "Looking at the results of the tests and what Renault have done with the performance of their engine, I think they are in very good shape". "We don't know what fuel loads people are running, but it looks interesting".
"Naturally after a test, you always improve the next day as the auto gets older and older throughout the test".More news: Apple to host WWDC 2019 between June 3 to 7
"We for sure have some things to improve, but I think everyone has", said Verstappen.
"But we're confident that we can do that during the course of the year".
"In general, the auto felt alright with medium and soft tyres but we still need to fully understand the compounds", said Verstappen. "My running was also a little different to the others in terms of preparation and there is definitely some lap time in that". It's been alright. The Mercedes looks very quick.More news: Ravens will sign free agents Earl Thomas, Mark Ingram