Webber tops final practice at Spa

The Saturday morning session was affected by rain, as were both yesterday, beginning on a damp track, drying during the middle of the hour before a torrential downpour in the last 15 minutes.

It was 15 minutes into the hour before the first cars ventured out onto track on slick tyres.

Several drivers took a turn at the top as the times fell, including Sebastian Vettel, Adrian Sutil, Nico Hulkenberg, Robert Kubica and Lewis Hamilton.

Conditions were good when Webber set his 1m46.106s lap - nearly three seconds quicker than the best time yesterday. Shortly before that, his Red Bull team-mate Vettel had been able to take Eau Rouge flat out with only one hand on the steering wheel while he covered the RB6's F-duct.

Vettel's session ended early when his car cut out and stuck in gear at the pitlane entry. He was pushed back to his box, where the team examined the problem. His engine was re-fired with 12 minutes to go but he did not return to the track. Red Bull put his incident down to an air box problem and say he was told to shut down the engine as a precaution.

Hamilton, Vettel and Jenson Button completed a sweep of the first four places for Red Bull and McLaren, with Kubica fifth and Fernando Alonso sixth, after a big sideways moment at Pouhon mid-way through the hour.

Felipe Massa, Sutil, Hulkenberg and Kamui Kobayashi completed the top 10.

The heavy rain in the last 15 minutes caught out Jarno Trulli and Hamilton, as both arrived at the Bus Stop chicane, on slick tyres, to find a sodden braking zone.

As the rain increased, only Jaime Alguersuari and Michael Schumacher went out to complete several laps - with Schumacher sliding off the road at Eau Rouge on his out lap. Button joined them on circuit late on, while the likes of Hamilton and Alonso were out of their cars for the last 10 minutes.

Pos Driver             Team                  Time       Gap    Laps
 1. Mark Webber        Red Bull-Renault      1m46.106s           10
 2. Lewis Hamilton     McLaren-Mercedes      1m46.223s  +0.117   17
 3. Sebastian Vettel   Red Bull-Renault      1m46.396s  +0.290   12
 4. Jenson Button      McLaren-Mercedes      1m46.397s  +0.291   17
 5. Robert Kubica      Renault               1m46.492s  +0.386   17
 6. Fernando Alonso    Ferrari               1m46.627s  +0.521   11
 7. Felipe Massa       Ferrari               1m46.962s  +0.856   10
 8. Adrian Sutil       Force India-Mercedes  1m47.064s  +0.958   15
 9. Nico Hülkenberg    Williams-Cosworth     1m47.160s  +1.054   16
10. Kamui Kobayashi    Sauber-Ferrari        1m47.296s  +1.190   17
11. Pedro de la Rosa   Sauber-Ferrari        1m47.388s  +1.282   15
12. Vitaly Petrov      Renault               1m47.406s  +1.300   15
13. R.Barrichello      Williams-Cosworth     1m47.512s  +1.406   14
14. M.Schumacher       Mercedes              1m47.695s  +1.589   16
15. Nico Rosberg       Mercedes              1m47.837s  +1.731    9
16. Sébastien Buemi    Toro Rosso-Ferrari    1m47.905s  +1.799   20
17. J.Alguersuari      Toro Rosso-Ferrari    1m47.981s  +1.875   18
18. Vitantonio Liuzzi  Force India-Mercedes  1m48.692s  +2.586    8
19. Jarno Trulli       Lotus-Cosworth        1m50.600s  +4.494   14
20. Bruno Senna        HRT-Cosworth          1m51.133s  +5.027    9
21. H.Kovalainen       Lotus-Cosworth        1m51.384s  +5.278   14
22. Lucas Di Grassi    Virgin-Cosworth       1m51.517s  +5.411   13
23. Timo Glock         Virgin-Cosworth       1m51.669s  +5.563   10
24. Sakon Yamamoto     HRT-Cosworth          1m52.001s  +5.895   13