The team was working on preparing for the final races in Japan and Brazil. Marc would spend his day focusing on setup work and tyre tests for tyre supplier Michelin. Marc would only complete thirty laps after having to cope with several technical problems. His best lap time of the day was a 1m:17.695. Olivier was to work on testing different cooling configurations. He would complete eighty seven laps, setting a best time of 1m:18.982.

The circuit would see several other teams testing at there were several accidents including Ferrari's test driver Luca Badoer crashing heavily during the morning session after suffering a suspected problem with his car's brakes.

WilliamsF1 Test Team Manager Tim Newton commented on the days testing: "Olivier Beretta ran the second FW26 today, replacing Antonio Pizzonia who has been sidelined due to an ankle injury sustained while in China. Despite coming in at extremely late notice, Olivier did a very good job today, completing 87 laps of various aero measurements and traction control work. Marc, unfortunately, didn't have such a good day as a few minor technical problems restricted his lap times. He should, however, be able to go better tomorrow.”

Testing continues on Wednesday, with Ralf Schumacher joining Marc.

POS. DRIVER TEAM TIME LAPS

1. F. Montagny Mild Seven Renault F1 Team 1:17.673 20/54
2. M. Gené BMW WilliamsF1 Team 1:17.695 16/30
3. A. Davidson Lucky Strike B.A.R. Honda 1:17.730 47/85
4. P. de la Rosa West McLaren Mercedes 1:18.103 18/56
5. A. Wurz West McLaren Mercedes 1:18.207 45/65
6. H. Kovalainen Mild Seven Renault F1 Team 1:18.255 60/75
7. J. Trulli Panasonic Toyota Racing 1:18.491 57/67
8. E. Bernoldi Lucky Strike B.A.R. Honda 1:18.898 42/96
9. O. Beretta BMW WilliamsF1 Team 1:18.982 78/87
10. L. Badoer Scuderia Ferrari Marlboro 1:19.760 17/18