Verstappen ended Friday tenths of rhythm in his Honda RB15, but was still Mercedes's closest contender, although his performance is not finished at low fuel levels as usual.
On Saturday morning, before the final practice, FIA revealed that Red Bull has completed a change in survival cells.
The team has submitted their declaration form as the rules have changed for 2019 to give teams the opportunity to self-control. submitted for approval by the FIA Technical Delegate Jo Bauer.
There is not yet a reason for the change, but it is understood that Red Bull knew before Friday that he would have to fill it out.
There is no punishment for changing a cell for survival at this stage of the weekend.
If he had changed the chassis on Friday morning before training, Verstappen would not be able to move on the road to FP3.
The rules state that if the survival cell changes after the initial review on Thursday, any such car can not be used until the next day.
The FIA also said that the Haas team had used one of their two permitted seasoned Commandant hours.
Haas's staff stayed in the hours between Saturday morning, from 2.30 to 1
This is to correct the oil leak on Romen Grogan's car