Question marks have been raised over the future of Nico Hulkenberg after Williams team-mate Rubens Barrichello revealed that the team is 'analysing the situation' with the rookie driver.

Hulkenberg joined the team at the start of the year as the reigning GP2 champion and after a difficult start to the campaign, has managed to secure four top ten finishes - three of which have come in the last five rounds.

The German is widely regarded as one of the potential stars of the future but Barrichello appeared to reveal that his team-mate's future with the Grove-based team isn't yet secure for next year, with a final decision still to be taken on whether he will retain his seat.

"My part is done, all that is left is the papers to make it confirmed," he told the Brazilian publication Globe Esporte. "That I will be with Williams in 2011 is 100 per cent.

"On my side I think it was an easier decision. They [Williams] are waiting. I think they are analysing the Nico Hulkenberg situation in order to do an announcement together for next season."

Despite Barrichello's comments, the likelihood is that Williams will field an unchanged line-up for the 2011 season.