MELBOURNE - Williams boss James Vowles says he still believes in Logan Sargeant despite putting Alex Albon in the American's car for the rest of the Australian Grand Prix.

With Williams only bringing one chassis to Melbourne, Albon will race in Sargeant's car after wrecking his own in Friday's first practice at Albert Park.

Sargeant scored one point in his rookie season last year with Albon scoring 27, which lifted Williams to seventh overall in the constructors' championship.