Sauber boss Monisha Kaltenborn reproved the decision by the stewards not to punish Haas' Kevin Magnussen for his responsibility in a first-lap collision with Marcus Ericsson.
The two drivers came together at Turn 3 on the opening lap with the Haas driver appearing to undertseer into the side of the Swede's Sauber.
The contact left Ericsson with a wounded car which was eventually retired on lap 22.
"I got hit from behind, which caused lots of damage on the right side as well as to the floor of the car," he explained.
"From that moment on, it was all about finishing the race. Later on, I had to stop the car on track due to a hydraulic failure caused by the incident on lap one."
Magnussen was cleared of any wrongdoing by the stewards, who ruled that he had "moved to the inside to avoid Ericsson and Magnussen followed a very similar line to the car in front of him.
"Ericsson did leave enough room, and Magnussen who was fully on the inside took a reasonable line, but unfortunately the action of the kerb forced him wide and caused the collision."
Kaltenborn was unimpressed however with the stewards' decision to give the Dane a free pass on an incident in which she clearly considered he initiated.
"The situation there was clear-cut, so it is incomprehensible why the stewards didn’t react to the incident."
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