Sochi: Four-time world champion Sebastian Vettel said he had no clear idea of why he had failed to qualify for the top ten for Sunday`s Russian Grand Prix.
The German managed only 11th place as he was eliminated and missed the top ten shootout on Saturday. His Red Bull team-mate Daniel Ricciardo qualified seventh.
"We knew that it would be difficult in general for us here with the amount of straights, but equally there are a lot of corners -- especially in sector two and three," said Vettel.
"I think we made a big step forward this morning, but I wasn`t able to take that forward into qualifying. Generally the car felt ok.
"Obviously it didn`t in qualifying, but this morning we were fairly happy and yesterday didn`t feel too bad either."
Red Bull`s run of four consecutive constructors championships will end on Sunday unless they can reduce Mercedes` current 190-point lead to 172 or less, with three races remaining.
Ricciardo, who is 73 points behind leader and pole sitter Lewis Hamilton of Mercedes in the championship, admitted the team`s position was bleak.
"If Hamilton wins and I stay in seventh, then after that there`s probably not much more we can get out of it," said the Australian.