Sergio Perez believes Force India faces a fight to get in to Q3 after being unable to recognise problems with his car on the supersoft tyre.
Pirelli has supplied the soft and supersoft compound tyres for this weekend's Singapore Grand Prix, with the softest compound best for the street circuit. However, Perez says the performance of the tyre over a qualifying run drops off so dramatically it is hard to work out how the car is handling itself.
"On my single lap, there’s so much degradation on the options, it hides quite a lot of your problems," Perez said. "It’s a bit like Monaco, you don’t really notice your weaknesses of the car, but as soon as you put fuel in you start to feel the balance and you realise that it’s not quite there.
"So there’s a lot of work that we need to learn. Obviously qualifying is very important and crucial here, but the race is very long and a lot of things can happen."
And Perez - who was sixth ahead of Nico Rosberg in FP2 - believes a number of teams will improve in FP3 ahead of qualifying this afternoon.
"Obviously it was a good lap [in FP2], but you have the Toro Rosso’s and the Red Bulls, the Williams’ which are normally running a lot of fuel. So I expect to have a big challenge to make it into Q3."
REPORT: Kvyat heads Raikkonen in competitive FP2
2016 F1 driver line-ups so far
Click here for some of the most memorable crashes at Singapore
Keep up to date with all the F1 news via Facebook and Twitter
Mercedes boss Toto Wolff recently opened up about how he first got wind of Lewis…
Formula 1 CEO Stefano Domenicali has revealed that a rotation of European races on the…
F1 made its long-awaited return to the African continent as David Coulthard raced around the…
Former Formula 1 team owner Eddie Jordan believes there is "not a chance" that the…
On this day in 2005, Red Bull Racing added a top-level recruit to its ranks,…
Ferrari has announced a major multi-year partnership with global technology powerhouse IBM, set to begin…