Felipe Massa is confident Williams can be in the mix for second place behind Mercedes during the early stages of the 2014 campaign.
Mercedes carried their winter testing form over to the first race of the campaign in Australia with Lewis Hamilton claiming pole position and Nico Rosberg winning the grand prix.
Williams, though, also proved their win pre-season form was no fluke as both cars made it into Q3 while Valtteri Bottas finished the race in fifth despite suffering a puncture after kissing the wall during the early stages.
Massa believes they are in the running for second place as much as any of their rivals.
"Looking at McLaren definitely they did a good race. They finished both cars in good points and they are leading the Championship," he is quoted as saying by Autosport.
"I would say Australia was a race where we could finish both cars there and a similar position as McLaren, so maybe we were going to be first in the Championship.
"Everything is possible now. Looking how we are compared to the others, I would say for the moment Mercedes is too quick compared to us, but after Mercedes everything is open and we can be there."