Mick Schumacher has refused to answer questions about his father in the run-up to his Formula 1 debut.
The health status of the German legend is unknown, after he had a serious skiing accident more than seven years ago.
"It's a private matter," 22-year-old Mick Schumacher said curtly on Thursday to a question about his father at his first press conference for a Formula 1 race.
The German will make his debut at the Bahrain Grand Prix for Haas on Sunday.
Mick Schumacher was there in December 2013 when his father was critically injured.
Michael Schumacher has been living at home in Switzerland for years.
In the last official statement from the family in January 2019, they said the former driver is "in the best possible hands".
With Kimi Räikkönen, Fernando Alonso, Lewis Hamilton, Sebastian Vettel, Daniel Ricciardo and Sergio Pérez, there are no fewer than six drivers on the grid on Sunday who have raced against Michael Schumacher in the past.
"It's pretty funny that they've ridden two generations of Schumacher," said Mick Schumacher.
"That shows that these drivers have achieved a lot."
See also: Seven years after the skiing accident: what do we know about Michael Schumacher?
Schumacher is looking forward to flying in
Schmumacher said he was really looking forward to his debut race.
"It feels good to be here. During the test days we already got a taste of Formula 1, now it really starts", said the driver of Haas.
"I'm ready to fly in."
With the also 22-year-old Nikita Mazepin, Haas has a second Formula 1 debutant.
"We've known each other since 2013, when we were teammates in karting," said Schumacher.
"After that we often raced against each other in the same championships. There has always been mutual respect."
The young Russian agreed: "I would like to say that I have a lot of respect for Mick. Some people are difficult to get along, but Mick is just the opposite."
Bahrain GP program
First training: Friday 12.30 pm
Second training: Friday 4 p.m.
Third training: Saturday 1 p.m.
Qualifying: Saturday 4 p.m.
Race: Sunday 5 p.m.