The Toyota and BMW drivers have admitted they are baffled at their teams' lack of pace in qualifying for the Monaco Grand Prix.
Toyota's Jarno Trulli and Timo Glock will start Sunday's race from the back row, with BMW's Nick Heidfeld and Robert Kubica just in front of them.
Heidfeld, whose F1.09 has shown no real pace all weekend said: "It is very disappointing, we did struggle for most the season and I felt we made a step forward in Barcelona.
"This track doesn't suit our car but on the other hand if you have a good car it should be good everywhere," he added. "We changed the car a lot, from free practice to here, which you normally do not do. I am disappointed, but we have to take it how it is, and I am looking forward still."
Toyota's Glock said after being knocked out of Q1 that he was mystified by his lack of speed.
"We have struggled the whole weekend and didn't find real pace with the car," said the German. "We are not far off in terms of driveability, and there is just some stuff to change there. But the overall pace is not there. There is something that we did not understand for the weekend."