"We put a lot of effort, probably too much, into the major package we introduced with the new exhaust system, taking up a lot of resource and costing us time that could have been better spent on the more conventional aerodynamic upgrades that will put us where we want to be," he said. "Now we are working twice as hard on all the key areas of performance on the car and the last piece of the jigsaw is to find more downforce.
"All the other key areas of the car are working well and, after a nervous few days, I am looking forward to the remaining races of the season," he continued, adding that while Kovalainen might be having a tough weekend in Singapore the team was happy with the way that second driver Vitaly Petrov had picked up the baton.
"I think Vitaly's performance today might just be the making of him as a Caterham driver," said Fernandes. "He drove outstandingly well today and I have never heard him speak so positively over the radio. He enjoyed his drive and his crew did a brilliant job to fix his car, and give him the platform to show what he can do."
"'m really happy with how quali went today," said Petrov. "It's my Father's birthday and the performance is my present for him."
Not that the day had gone entirely to plan, as Petrov hit the wall and did extensive damage to the right rear of his car in FP3 to bring out a red flag and early end to the session.
"He [my father] told me this morning, 'Don't push too hard' - and then I went and crashed the car in P3!" said the Russian. "The boys did a fantastic job in the garage to repair the car and it was actually all ready 15 minutes before Q1, so thank you very much to them."