Lewis Hamilton and Toto Wolff have both held their hands up after the former's Mercedes was disqualified from the US Grand Prix on Sunday, several hours after the chequered flag fell.
It's not clear whether Mercedes' new floor upgrade was directly responsible for Hamilton's disqualification, but Wolff appeared to suggest that it played a part – noting that setting up a car with fresh upgrades is difficult with only one practice session on a sprint weekend.
Hamilton had secured a strong second place before the FIA ruling came down to wipe it away, that place now going to McLaren's Lando Norris.
Wolff: We got it wrong
Speaking to the media after the decision, Wolff admitted: "Set-up choices on a sprint weekend are always a challenge with just one hour of free practice – and even more so at a bumpy circuit like COTA and running a new package.
"In the end, all of that doesn't matter – others got it right where we got it wrong and there's no wiggle room in the rules. We need to take it on the chin, do the learning, and come back stronger next weekend."
Meanwhile, Hamilton insisted on looking at the positives.
"It is of course disappointing to be disqualified post-race, but that doesn't take away from the progress we've made this weekend," he said.