Romain Grosjean says he is more and more happy with the decision he has made for next year, with Haas F1 poised to confirm his 2016 switch next week.
Haas has announced that it will hold a press conference at its headquarters in America next Tuesday, when it is expected that Grosjean's move from Lotus will be made public.
Grosjean said in Singapore last weekend that he had made his mind up about what he planned to do, with it understood that Renault had until this weekend to confirm its plans for next year or he would switch.
With Renault's proposed takeover of Lotus still having not gone through, and fresh trouble for the Enstone-based team after freight delays, Grosjean suggested in Japan that he was getting ever more comfortable with what he was going to do.
"The more I think about it, I am more and more happy with it," explained the Frenchman. "It is not so easy to take a decision in your life, your career – but it is part of our job. Like a set-up change, overtaking, or start. It is all decisions."
Grosjean said there was no rush to finalise what he was up to, but made clear that it would be made public imminently.
"There is no deadline but it should arrive sooner rather than later," he said. "In my mind, it is done. It is all done, but you will know soon."
Haas announcement next week
Haas team owner Gene Haas and F1 team principal Gunther Steiner will hold the press conference, although it may only be to announce Grosjean.
Ferrari tester Esteban Gutierrez is favourite to line-up alongside Grosjean but an announcement about the team's second driver may come later.
The American outfit has been clear from the start that it wanted an experienced line-up for its debut in F1, with it always likely to take one of Ferrari's young drivers.