Trulli Wants More from Toyota

The Italian started the campaign as one of Fernando Alonso's closest challengers in the World Championship, but as the season has developed he has seen his TF105 start to lose pace as other teams have made better progress.

And it is Toyota's failure to introduce the kind of developments they need to move forwards that has left Trulli frustrated.

When asked why he believed Toyota were dropping back, Trulli told Gazzetta dello Sport: "I don't know. We started so strong that I was hoping to see constant progress. I was expecting a firm response by mid season.

"We have had nothing instead, and this situation of impotence has disappointed me a bit. This is a team that must learn to improve during the Championship. The potential is there, the company too, and the people aren't lacking. However the capability to react is missing - and now the top management knows that."

Trulli believes that the key for Toyota to make the jump and become a top team is for them to get to grips with the need for constant development.

"The work must be organised around a rhythm, by managing to constantly introduce new things. The fibre of a top teams is this: to be able to revolutionize the car during the Championship if things aren't going well.

"Just look at what McLaren did last year. Everyone else, instead, if they start well at some point they struggle, while if they start badly it's a disaster. There, we need to work to become a top team."