MONTMELO, SPAIN - MARCH 01: Valtteri Bottas of Finland and Williams drives during day four of the final Formula One Winter Testing at Circuit de Catalunya on March 1, 2015 in Montmelo, Spain. (Photo by Dan Istitene/Getty Images)
MONTMELO, SPAIN - MARCH 01: Valtteri Bottas of Finland and Williams drives during day four of the final Formula One Winter Testing at Circuit de Catalunya on March 1, 2015 in Montmelo, Spain. (Photo by Dan Istitene/Getty Images)