After been outside the top ten in the final Friday practice at the Monza circuit the Williams F1 team was looking to improve their pace in the Saturday practice. With the start of the hour long session both Williams drivers Bruno Senna and Pastor Maldonado would take to the track early and after fifteen minutes Bruno would set a 1m:272.63 to be fifth. The quickest time was from Perez with a 1m:25.894. Bruno would improve to be fourth with a 1m:26.554. Hamilton would move to the top of the times running on the hard tyre with a 1m:25.816, with Button second. Bruno was also on the hard tyre for these early runs. At this time Pastor was third running with a new helmet design that had the words "Less trouble More speed" but after twenty minutes of the session Pastor was down in sixth with a 1m:26.016.

Bruno would improve to be second with a 1m:25.718. At the front Hamilton was fastest with a 1m:24.687 while for Red Bull Vettel was fifth and Webber eighth. Pastor was able to move up to third with a 1m:25.383.Button was still second behind Hamilton with Perez third and Bruno fourth. With half the session completed drivers would start to switch to the medium tyre including Bruno. Alonso would go fastest with a 1m:25.036. Rosberg running on the softer tyre would move up to third with a 1m:25.036. Bruno's first effort on the softer tyre was a 1m,:25.461 but he would get stuck behind a Marussia of Pic and have a moment at the second chicane running over the speed bumps.

With more drivers on the softer tyre Bruno would drop to eighth and after s frustrating time not been able to get the best out on his tyres he would pit. As the session drew to a close the track was very busy with drivers out on their qualifying simulations. Hamilton would go fastest with a 1m:24.578 over Alonso. Hulkenberg would move up to eighth with a 1m:25.289. Vettel was tenth but on his final run his car would stop at the Roggia chicane. In the dying moments Pastor was on a quicker lap but he would pit finishing in tenth with a 1m:25.383. At the end of the session Bruno had dropped to thirteenth with a 1m:25.461. Di Resta would finish in third followed by Massa, Button, Rosberg, Perez, Raikkonen. Hulkenberg and Pastor.

An encouraging session for both Williams drivers but now it was down to whether or not Bruno could move himself into the top ten in qualifying. But for Bruno it had been difficult to get a clear lap but he did finish very close behind both Red Bull cars.

Pos  Driver         	 Team		       Time      Laps
 1.  Lewis Hamilton      McLaren-Mercedes      1m24.578s 18
 2.  Fernando Alonso     Ferrari               1m24.579s 15
 3.  Paul di Resta       Force India-Mercedes  1m24.849s 20
 4.  Felipe Massa        Ferrari               1m24.909s 16
 5.  Jenson Button       McLaren-Mercedes      1m24.994s 17
 6.  Nico Rosberg        Mercedes              1m25.036s 22
 7.  Sergio Perez        Sauber-Ferrari        1m25.160s 23
 8.  Kimi Raikkonen      Lotus-Renault         1m25.255s 19
 9.  Nico Hulkenberg     Force India-Mercedes  1m25.289s 20
10.  Pastor Maldonado    Williams-Renault      1m25.383s 18
11.  Mark Webber         Red Bull-Renault      1m25.389s 21
12.  Sebastian Vettel    Red Bull-Renault      1m25.406s 17
13.  Bruno Senna         Williams-Renault      1m25.461s 21
14.  Michael Schumacher  Mercedes              1m25.563s 23
15.  Kamui Kobayashi     Sauber-Ferrari        1m25.689s 22
16.  Daniel Ricciardo    Toro Rosso-Ferrari    1m25.706s 16
17.  Jerome d'Ambrosio   Lotus-Renault         1m25.973s 20
18.  Jean-Eric Vergne    Toro Rosso-Ferrari    1m26.003s 19
19.  Heikki Kovalainen   Caterham-Renault      1m26.657s 18
20.  Vitaly Petrov       Caterham-Renault      1m27.267s 16
21.  Charles Pic         Marussia-Cosworth     1m27.454s 20
22.  Timo Glock          Marussia-Cosworth     1m27.728s 19
23.  Narain Karthikeyan  HRT-Cosworth          1m28.035s 23
24.  Pedro de la Rosa    HRT-Cosworth          1m28.384s 17