Mercedes claim 'really bad' USGP if Kimi Antonelli wins F1 crown in Austin

Mercedes believe it will have suffered "a really bad" United States Grand Prix if Kimi Antonelli wins the F1 drivers' championship on Sunday.

Antonelli holds a commanding 102-point cushion over team-mate George Russell going into the race at the Circuit of the Americas.

The mathematics mean if Antonelli wins, Russell would need to finish ninth or lower for the 20-year-old Italian to become the youngest champion in F1 history.

Speaking after second practice, in which Antonelli was second quickest, just 0.043s behind Ferrari's Charles Leclerc, Mercedes deputy team principal Bradley Lord made clear that outcome is the opposite of what Mercedes wants from its weekend.

"Ultimately, for Kimi to win this weekend, it means the team's had a really bad race because the maths say George needs to be ninth or below, and that isn't how we want to go racing, and the result we're aiming for," said Lord.

"It's a very minimal chance. It's theoretically possible, but in practical terms, this isn't the match-point weekend, and we'll just try and get out there, get as many points as possible, and then see when the maths start to come towards us a little bit more."

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Tyre management the key battleground

Attention on Saturday and Sunday is instead likely to centre on strategy, with Pirelli bringing the C2, C3 and C4 compounds to Austin and nominating the hard tyre as the basis for a one-stop race, though higher track temperatures could push teams towards two stops.

Lord flagged rear-tyre preservation through the technical third sector, where repeated traction zones out of slow corners generate heavy degradation, as the decisive factor in how Sunday unfolds.

"Looking after tyres is going to be absolutely crucial. If you can keep your rear tyres alive and working well in sector three, then that opens up all the different possible strategies," he said.

"So we'll wait and see, let the strategists crunch the numbers after the long runs and see what the tyres are doing, and then we'll understand a little bit better where we need to go on Sunday."

Long-run pace through Friday suggested a tight fight at the front, with Charles Leclerc, Max Verstappen, Antonelli and Lando Norris all showing similar form.

"We were looking at the overlays of the long runs, and you've got to squint at it to really see too much difference between Leclerc, Verstappen, Kimi, and Norris looks strong as well, so it's going to be a very close battle between all eight cars [from the top four teams]," added Lord.

"On a single lap, it's a matter of a tenth and a half, a tenth here or there, so it's going to be really hard-fought and exciting."