Valtteri Bottas isn't falling into a pitfall of complacency despite Mercedes' pre-season form, believing the German team cannot feel confident they will start the F1 season at the front.
Bottas benchmark fastest pre-season lap was struck down from the timesheet this morning when Sebastian Vettel went quicker on the penultimate day.
"We are definitely not confident that we are in front," said Bottas.
"We are not relaxing, we are not in a comfortable situation at all. We do feel that the other teams have made good progress over the winter.
"Ferrari are looking very strong, Red Bull can always surprise, and other teams can be strong. But Ferrari look solid, strong and fast - and who knows what people will bring to Melbourne.
"We should not underestimate them at all. We're not saying we're number one, we're just working flat out."
Bottas was impressed by Vettel's morning effort on the Pirelli's UltraSoft compound, especially as the German eased off on the straight, thus sandbagging his lap.
"A very fast time," Bottas admitted.
"It's difficult to know what type of things they were running and how much they were taking out of their car but a respectable time and very quick. Definitely, we shouldn't underestimate them."
GALLERY: F1 drivers' wives and girlfriends
Keep up to date with all the F1 news via Facebook and Twitter
Formula 1’s next generation of cars will not just look different – they will sound…
Williams finally rolled its long-awaited FW48 onto the track at Silverstone on Wednesday, trading weeks…
Christian Horner has waded into Formula 1’s latest technical storm, addressing the growing controversy over…
Aston Martin’s chief architect and team principal Adrian Newey believes Formula 1’s latest buzzword is…
Fresh from pre-season testing and with a world title now stitched onto his racing overalls,…
On this day in 1979, Jacques Laffite won the Brazilian Grand Prix at Interlagos as…