Bruno Senna has said he would be reluctant to enter formula one in the middle of a season with no testing experience.

This weekend in Hungary, new Toro Rosso recruit Jaime Alguersuari, 19, will become the youngest ever F1 rookie, with only two straight-line tests in grand prix machinery under his belt.

25-year-old Senna, who is not racing full time in any category this year, had been similarly linked with the Faenza based team, but he told GP Week that it is "too late" to be still aiming for a drive in the 2009 championship.

"I'm in Miami, having some time off and waiting for the (political) mess in formula one to resolve itself so that I can manage to have some productive chats with people," he said.

Senna added that an opportunity to jump into the sport now as a rookie amid the in-season testing ban would not be overly attractive.

"It would do more harm than good to jump in with no testing," the Brazilian insists. "It's better to wait and do things properly for next year."

Senna attended the recent British grand prix and reveals he has been in contact with some of F1's existing teams as well as the "new teams".