After a disappointing two-year spell with McLaren, he switched to the start-up team last season and is aiming to step into the midfield in 2011.

"I feel that my career is back on the rise," Kovalainen told Finnish newspaper Turun Sanomat. "I've consolidated my position after what happened at McLaren and my feeling is very positive.

"I have not looked anywhere else, I like it with this team. I'm not thinking about anything else, even in a not-serious way. We are right on track with what we have had to do and where we are going, so why would I have to go somewhere else?"

Kovalainen admitted that he would "of course" have to think about his commitment should Red Bull or Ferrari come knocking.

"But the truth is that I am quite happy, it really was not a bad idea to come to this team," he said.

Turun Sanomat said the T128 car will have a new diffuser and exhaust for May's Spanish Grand Prix, delivering up to 0.8 seconds per lap.