Kamui Kobayashi expressed his frustration after a quirk in the Formula 1 regulations meant he dropped a position at the Chinese Grand Prix.
Kobayashi had been involved in a race long duel with Marussia's Jules Bianchi, which was settled in favour of the Caterham driver when Kobayashi passed the Frenchman into the hairpin on the final lap.
That meant Kobayashi's pass on Bianchi did not count and he subsequently dropped to 18th place.
"Finishing 18th isn’t the final position we’d want, but after a really good battle with Jules I’m relatively pleased with how the race went," he said.
"However, it’s a real shame that my move on him on the last lap now doesn’t count due to the mistake with the chequered flag, something we had nothing to do with.
"We’d had a really good battle for the last few laps of the race and I got him on what was the last lap, until it turned out the chequered flag had been waved a lap too early by mistake – until we found that out after the race it had been good to see what a small victory like that does for the team as it lifted everyone at the end of a very tough first four races of 2014."
Kobayashi insists that Caterham is determined to close the gap to their midfield rivals ahead of the next round in Spain.
"Even though we had good race with [Pastor] Maldonado for the first third of the race it’s clear we don’t have the outright pace to fight Lotus or Sauber yet, but we have a good package coming for Spain and we are determined to try and close the gap," he said.
"The first four races have been hard, but having both cars finish shows the progress we and Renault have made with reliability. Now we have to build on that and use the next couple of weeks to recharge ourselves so we can come back stronger in Barcelona."