• Ralf Schumacher believes that the Andretti family has completed its buyout of the Alfa Romeo F1 team.
• Schumacher says that the deal is yet to be officially confirmed.
• McLaren boss Zak Brown says that the Andrettis are 'serious about F1'.
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Michael Andretti's buyout of the Formula 1 team currently known as Alfa Romeo is a done deal.
That is the view of Ralf Schumacher, a former F1 driver who purports to know for sure that Swedish billionaire Finn Rausing has sold most of his stake in Swiss-based Sauber.
Schumacher told Sky Deutschland: "It hasn't been officially confirmed yet, but 80% of Sauber has already been sold to Andretti. The Rausing family is no longer a shareholder, although Finn Rausing himself has retained 20%."
'Serious about F1'
The news appears to be backed up by McLaren supremo Zak Brown, who reveals that fellow American Andretti - a former F1 driver - is "very serious about Formula 1". It emerges that Brown is actually connected with Andretti Acquisition Corp., an entity lodged with the United States Securities and Exchange Commission.
"I don't think it's my position to really comment on Michael's situation," Brown said in Austin. "What I would say is that he is very serious about F1. I think it would be great if Michael and the Andretti name were involved in F1, but we'll see what happens."
He clarified that his connection with the Andretti acquisition company "doesn't have anything to do with F1".
Valtteri Bottas, meanwhile, insists he has been in the dark about the Andretti goings-on, even though he has signed to race for Alfa Romeo next year.
"Of course, as a future driver of the team, it would be nice to know a little more about the plans," said the Mercedes driver in Austin.
But he also insisted he wouldn't mind if Andretti became the new team owner, declaring the rumoured buyout: "Why not?"