Sainz had looked sharp throughout the weekend's practice sessions but it appear his judgement at the end of FP3 may be the only thing in question.
False start Sainz
The 29-year-old appeared to break FIA protocol by carrying out a practice start not in accordance with 10.3 of their race notes, which read:
"All drivers carrying out a practice start must do so by pulling as far forward on the grid as possible and, if necessary, should wait for others to carry out a start before getting to a grid position further forward.
"Under no circumstances should a driver make a practice start if another car is still stationary in front of him on the same side of the grid."
Sainz though escaped punishment for the incident though, with stewards instead opting to deliver just a driving reprimand, noting: "Car 55 performed a practice start in violation of the Race Director’s Event Notes, which only permit a practice start once the car has crossed the Line.
"Car 55 had not crossed the line, and while the stewards recognised that the situation ahead of him was confusing, consistent with prior decisions, they issue a Reprimand (driving).
Sainz of course has previous when it comes to the stewards at Albert Park, infamously picking up a time penalty following a collision with Fernando Alonso in the last-gasp race start after a red flag, right at the end of the 2023 race that caused him to tumble well out of the major points.