The only thing the teams could really learn in the opening session was that Marina Bay takes a long time to dry in twilight, for although the rain had stopped over an hour before practice commenced, it was only in the final 15 minutes that the track was really ready for slicks.
Sauber's Kamui Kobayashi and Virgin's Timo Glock were particularly entertaining - and quick - on the damp track, but when the surface finally dried the timing screen rapidly turned itself inside out as the order changed with every lap completed on the ever-faster circuit.
In the closing seconds it looked like this might be the first time that Michael Schumacher would top a session in his comeback, but Mark Webber slipped through with a slightly quicker time to deny the seven-time champion.
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