Valtteri Bottas is not ruling out racing to his first-ever Grand Prix win in 2015.
The Finn was a standout of last season and is now being linked with a potential move to Mercedes or Ferrari.
But before that, he will race again with the resurgent Williams team in 2015.
The independent British outfit is expected to be among Mercedes' main challengers this year, but Williams kept a low profile at the Jerez test with its new FW37.
It was Ferrari, in fact, who posted the headline times at Jerez.
"I seem to recall a year ago," 25-year-old Bottas told the Finnish newspaper Turun Sanomat, "where Ferrari was also the fastest at Jerez.
"Once the season started, the picture changed dramatically," he said.
Wait until Barcelona
"As for Williams, our new car has very good handling but at this stage of the season it does not make sense to go into details.
"The real speed of the cars will not be judged until the final test in Barcelona," Bottas added.
He is not ruling out, therefore, that Williams will emerge then as among the fastest of 2015, allowing Bottas to join the coveted ranks of Grand Prix winners.
"That's what I'm after," Bottas is quoted by the broadcaster MTV3.
"I am not a fortune teller, but I believe very much that it may be possible."