McLaren caught the headlines on day 4 but this was down to the weather, what impressed me more was that Virgin racing finally seem to be up and running.
Adrian Sutil was the person on top for most of the day, backing up the assertion that this year's VJM 03 is a good improvement on its predecessor.
Yet again Barrichello put in lots of laps in the Williams and yet again the team seem to be there or there abouts on pace. It will be interesting to see just how well they do.
Kubica gave Renault a few more smiles by putting himself fourth today. Surely his time was helped by both Ferrari and Mercedes having minor problems.
Indeed it was Schumacher in the Mercedes who was next up. He has declared himself happy with the running today but it is clear that the team doesn't have the performance advantage it enjoyed at the start of 2009.
De la Rosa was next up - the only time that the Sauber hasn't been in contention for a top lap time. It seems that today wasn't about glory runs but putting laps on the board. the whole team will hope that this isn't their genuine position.
So, to the final two. Having been near to the top all week, one would have thought that the Toro Rosso would easily have been above the Virgin team. However, today was somewhat of a breakthrough; the VR-01 set the 9th fastest time and completed 63 laps. This is revolutionary from a team that had ran 20 laps at most before this.
Despite doing 98 laps, Alguersuari was at the bottom of the time sheets. I can only assume that he ran heavily today but even so, it doesn't look good being beaten by the new team.
My driver of the day? Di Grassi. Simply to give the new team some credit after the struggles of the last few days.
1. L. Hamilton McLaren MP4-25 1:19.583 113 laps
2. A. Sutil Force India VJM-03 1:20.180 84 laps
3. R. Barrichello Williams FW32 1:20.341 90 laps
4. R. Kubica Renault R30 1:20.358 85 laps
5. M. Schumacher Mercedes GP W01 1:20.613 84 laps
6. S. Vettel Red Bull Racing RB6 1:21.203 90 laps
7. F. Massa Ferrari F10 1:21.485 160 laps
8. P. de la Rosa Sauber C29 1:22.134 105 laps
9. L. Di Grassi Virgin Racing VR-01 1:22.912 63 laps
10. J. Alguersuari Toro Rosso STR5 1:24.072 98 laps