Lewis Hamilton pulled out of a sponsor's event in Sao Paulo, fueling speculation that the British driver was unwell and would perhaps not race in Brazil.
But Mercedes has now confirmed that, although a bit under the weather, the 2015 World Champion will be on the Brazilian Grand Prix grid this weekend.
"He's not going to miss the race," commented a Mercedes spokesman..
"He's going to be a day late... the doctor advised him to cancel the earlier flight so we had to cancel a press conference scheduled today. But he will be with us tomorrow."
In Mexico, Hamilton declared himself particularly motivated to win in Brazil where he has failed to triumph in his eight attempts.
Finally achieving victory at Interlagos would be the perfect salute to Ham's childhood hero Ayrton Senna.
"It's amazing to think that it took Ayrton eight attempts to win this race and it's one of the few I haven't yet won myself," he said.
"If I can change that this weekend it would be a salute to him and another highlight to add to this amazing year, so I'll be going all out to make that happen."
'In F1 you discover a whole new person in yourself' - click here for the full Carlos Sainz interview
Click here for an exclusive Q&A with Jolyon Palmer
Use the red tabs on either side of the screen to scroll through more Formula One news and features
Click here for the F1 drivers' girlfriends gallery
Keep up to date with all the F1 news via Facebook and Twitter
Formula 1 is gearing up for a new digital era in the United States –…
Carlos Sainz has lifted the lid on a private paddock conversation he enjoyed with Fernando…
Christian Horner has offered a revealing look back at his dramatic exit from Red Bull…
Alain Prost follows Niki Lauda by just two days on the February birthday calendar, the…
Sergio Perez’s Formula 1 comeback with Cadillac is already under the microscope – and he…
After pre-season testing in Bahrain gave F1’s drivers their first real taste of the sport’s…