Australian driver Will Power says Team Penske are ready to move forward from the scandal which led to the sacking of three senior executives just days away from Sunday's Indianapolis 500 showpiece.

IndyCar giants Team Penske have fired three senior executives after a scandal over illegal modifications to cars ahead of this week's showcase Indianapolis 500 race.

Spanish pole-sitter Alex Palou dominated from start to finish to win Sunday's Alabama Indy Grand Prix and stretch his IndyCar points lead in quest of a third consecutive season title.

Reigning IndyCar champion Alex Palou of Chip Ganassi Racing powered to victory in the opening race of the new season at the Grand Prix of St Petersburg on Sunday.