MONACO (AP) -- Fernando Alonso gave Ferrari another boost when he posted the fastest time in Saturday's third practice session at the Monaco Grand Prix, with championship leader Sebastian Vettel at fourth best.
Two-time former F1 champion Alonso was also quicker than Vettel in Thursday's second practice, and the Spaniard again made the most of the supersoft optional tires to record a best lap time of 1 minute, 14.433 seconds.
McLaren's Jenson Button was second quickest in 1:14.996, while Alonso's teammate Felipe Massa was third in 1:15.024.
Defending champion Vettel clocked 1:15.245, but the German ran on prime soft tires.
Vettel will look to power his Red Bull to a fifth pole position of the season in qualifying later Saturday.