Alonso says Turn 10 kerbs a concern

Toro Rosso's Sebastien Bourdais had already expressed worry about the tight chicane at Turn 10 and the high bumps over the kerbs that could damage a car going over them.

Renault's Alonso admitted on Thursday that he was concerned a driver's weekend could end early as a consequence of hitting the kerbs.

"It is not the best solution that they could find," said Alonso. "We worry that if you miss the chicane or miss the line then you have to go over the kerbs - and then perhaps you damage the chassis or damage the bottom.

"If you damage one car it is not a problem because you can take the T-car. But if you damage two, you go home. This is a concern at the moment.

"But I don't know what can be a better solution and I don't know if they are able to do it so quickly before tomorrow. So I don't know."

The FIA is looking at the situation, with race director Charlie Whiting having inspected the corner tonight.

Singapore organisers were also testing the backup lighting system tonight, deliberately switching off some of the lights to see how quick the backup came up.