Red Bull Racing have work to do to improve it's 2025 car after concluding testing in Bahrain.
The Milton Keynes team are hoping the RB21 can be an improvement on the 2024 car, the RB20, but testing did not fully satisfy some involved.
Four-time Word Champion Max Verstappen was able to set the second-fastest time of day three, just 0.021 seconds behind Mercedes' George Russell.
However, the 27-year-old believes there is more that needs to be done to get the car to the level expected, with the Dutchman trying out new parts on his car on day three.
Speaking to F1.com, Verstappen commented: "I think we had a decent day today. There were a few little problems, but overall, we completed quite a bit of what we wanted to do."
"I think it wasn’t bad, but at the same time there is still a bit of work to do."
He added: "However, it is what we expected and we will keep on working and keep on trying to improve and, hopefully, as we go into Melbourne, we will learn a bit more by going through all the data and see where we are at."
"It is difficult to tell where everyone’s pace is, so there is still a bit of work to do for us."
He concluded: "We are looking forward to starting racing properly again in Australia."
Technical director Pierre Wache appeared to share the same feelings as Verstappen, saying: "It was not as smooth a test as we expected and the team expected, but it is better to find some problems here than later down the line and it is why we are here, to understand the car."
"The weather was not with us and not very representative of this track, but we tried to explore the potential of the car and tried to understand how it responds to different set-ups, and I think we more or less achieved that."
He added: "I think it’s very difficult to see a starting order for Melbourne across the grid right now."
"You see that four teams look quite quick, including us, but we didn’t look too much at other teams, we tried to focus on our programme."
He concluded: "I am not as happy as I could be because the car did not respond how we wanted at times, but it is going in the right direction, just maybe the magnitude of the direction was not as big as we expected, and it’s something we need to work on for the first race and future development."
