Despite widespread rumours in Suzuka this weekend, it appears that Nico Hulkenberg has not yet signed a contract with any team for 2014.

Martin Brundle told Sky Sports F1 that he was convinced that Hulkenberg had already formally inked a deal with a new team although he was not able to reveal which team that was. His words were backed up by BBC Sport's analyst and former F1 team owner Eddie Jordan.

Jordan's view was that Hulkenberg had signed to return to Force India next year - which may end up ousting Paul di Resta from a race seat. But reports from Italy's Gazzetta dello Sport insisted that Hulkenberg's deal is with Lotus, which would see him replace the Ferrari-bound Kimi Raikkonen and likely see him alongside Suzuka star Romain Grosjean whose 2014 option is now expected to be picked up by the team.

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"We have known for a long time, and he showed it again today, that he can drive at the front in a good car," Lotus team principal Eric Boullier told Germany's Auto Motor und Sport. "We don't judge a driver by one race."

But Sauber F1 boss Monisha Kaltenborn also told reporters at Suzuka that she was still in negotiations with the 26-year-old German and was still hopeful of retaining his services for 2014, after he has led their resurgence in the second half of this season and helped make Sauber a top ten fixture in recent Grand Prix weekends.

"It's a possibility for us to keep him," she insisted, despite reports that Hulkenberg's current contract had already been terminated by the team as part of the fall-out from their mid-year financial crisis.

But Hulkenberg himself insisted that no deal had yet been done, whatever the rumours said.

"I'm sure it will happen in the next couple of weeks, I'm confident we will get something sorted," he told Sky Sports F1 after this weekend's Grand Prix. "My mobile is on."

And judging from comments Boullier made to the Sporting Life, that phone might start ringing very soon.

"With the deals, we are are edging in the right direction, but until things are signed and confirmed, we will see," said the Lotus boss. "Everything should fall in place soon ... He is our choice."