Glock fastest in final Bahrain practice

The German's final flier on super-softs, a 1m32.605s, was enough to topple Lewis Hamilton's best up until that point by more than 0.3 seconds.

But on the following lap, with five minutes of the hour long session left to go, Glock's car appeared to suffer some kind of electrical fault and he was forced to coast to the side of the backstraight.

Ferrari's Felipe Massa improved to second fastest in the last minutes of the session, eclipsing this year's free practice star Nico Rosberg in the process.

Hamilton, who was fastest for much of the session, eventually tumbled down to fourth, while Kimi Raikkonen - who set the early pace - was fifth.

Nelson Piquet, who appears to be having a stronger weekend than of late, was sixth quickest ahead of BMW's Robert Kubica and Williams driver Kazuki Nakajima. Jarno Trulli didn't seem to go for a low-fuel run and ended up ninth, while Nick Heidfeld completed the top ten.

There were few incidents in the session, Heikki Kovalainen, who ended the session 12th behind Sebastian Vettel, had a throttle sensor problem early on.

Sebastien Bourdais also found himself pit-bound for much of the second half of the hour and ended practice in last place.

Pos  Driver        Team                      Time              Laps
 1.  Glock         Toyota               (B)  1:32.605           16
 2.  Massa         Ferrari              (B)  1:32.728 + 0.123   20
 3.  Rosberg       Williams-Toyota      (B)  1:32.906 + 0.301   18
 4.  Hamilton      McLaren-Mercedes     (B)  1:32.975 + 0.370   16
 5.  Raikkonen     Ferrari              (B)  1:32.986 + 0.381   18
 6.  Piquet        Renault              (B)  1:33.176 + 0.571   19
 7.  Kubica        BMW Sauber           (B)  1:33.195 + 0.590   13
 8.  Nakajima      Williams-Toyota      (B)  1:33.302 + 0.697   17
 9.  Trulli        Toyota               (B)  1:33.397 + 0.792   19
10.  Heidfeld      BMW Sauber           (B)  1:33.415 + 0.810   14
11.  Vettel        Red Bull-Renault     (B)  1:33.443 + 0.838   16
12.  Kovalainen    McLaren-Mercedes     (B)  1:33.478 + 0.873   12
13.  Alonso        Renault              (B)  1:33.482 + 0.877   13
14.  Sutil         Force India-Mercedes (B)  1:33.534 + 0.929   17
15.  Button        Brawn GP-Mercedes    (B)  1:33.586 + 0.981   17
16.  Barrichello   Brawn GP-Mercedes    (B)  1:33.686 + 1.081   17
17.  Buemi         Toro Rosso-Ferrari   (B)  1:33.720 + 1.115   15
18.  Webber        Red Bull-Renault     (B)  1:33.726 + 1.121   14
19.  Fisichella    Force India-Mercedes (B)  1:33.962 + 1.357   15
20.  Bourdais      Toro Rosso-Ferrari   (B)  1:34.990 + 2.385    7

All timing unofficial