Sauber: New front wing and diffuse
"Singapore is the start of the last five races of the season, which are all flyaways. It's a tricky, technical circuit, one that is traditionally quite bumpy, so mechanical grip and mechanical set-up are important," Technical Director James Key said.
"It's probably the street circuit which is closest to Monaco in terms of the nature of the corners and the extreme high downforce levels. Of course, it's a night race and unique in that respect.
"It's a case of using the car the best way possible on Friday to get the right set-up for the circuit's conditions, and trying to ensure we have a good understanding of the tires.
"The other important thing is that it's a track where it's quite tricky to overtake, so we are going to have to concentrate specifically on the qualifying performance.
"For the car we have quite a large aerodynamic update with a new front wing, a new diffuser and various other parts around the car. We hope the new package works as planned and then we shall see how we go."