Mark Webber fears Red Bull does not have the pace to be in the Monaco Grand Prix pole fight after the champion team struggled in Thursday practice in Monte Carlo.
The Australian was only 13th in the fully dry morning session, then seventh in the brief period of dry afternoon running before the showers.
Webber's team-mate Sebastian Vettel was ninth and 10th in the two sessions.
"It was not easy for us. We have got some work to do in the next 24 hours," said Webber. "There are clearly some very quick cars and we have to improve our car."
He acknowledged that the lack of dry track time would not help Red Bull get to the bottom of its issues.
"We didn't get to do as much running as we would like, clearly, same for everybody," Webber said. "That is the way it went today. Monaco is like that; it throws up some different challenges and we have a few at the moment."
Asked if he felt Red Bull had the pace to be on pole position, Webber replied: "It will be very difficult. We have work to do."