Singapore kerbs to be improved overnight

The first of Friday's sessions had to be delayed for 30 minutes because plastic kerbs were being lifted away from the track, and further problems were encountered in the evening's second practice.

Keen to avoid any problems on Saturday, the FIA is working with track officials to improve matters - and is confident the situation can be sorted ahead of final free practice.

The current plan is for the kerbs at Turn 3 and Turn 7 to be removed and painted - with drivers instructed that they will not be allowed to cross the white line that designates the side of the track.

At Turn 14, the kerb on the entry to the corner will be removed entirely, while efforts will be made at Turn 10 and Turn 13 to ensure that there are no further issues.

However, the FIA is being flexible with its approach to ensure its solution works, and will only inform the teams of its definitive plan ahead of FP3.

Fernando Alonso said the situation was not of too much concern to him - and the only impact for Saturday was that drivers may have to modify their racing lines to ensure they do not run off the track.

"It's the same for everybody," said Alonso. "Obviously we lost a bit of time in FP1, which is never a help.

"For tomorrow, I guess there will be some further changes, some of the kerbs will be removed in some of the corners and some of them they will repair. Tomorrow we need to find again maybe different lines, or different ways to attack the corners, but it's the same for everybody."

Felipe Massa added: "In some corners I think it was fine, not too bad like on the exit of corner 3. Maybe the exit of corner 14 was okay without the kerb, but it was quicker and it will be even quicker tomorrow because outside it was very slippery, but it's getting the grip.

"It's not a big change having or not having it. But I think they are going to put it back there and take it away in some other places, like the entrance of corner 13. We don't need that kerb, all of the drivers agree that the kerb is there but we don't need it.

"It's a very slow corner so it's no problem. We'll see how the changes are tomorrow - I think out of corner 5 they will take it away."