F1's flexi-wing row seemingly took a fresh twist in free practice for the Azerbaijan Grand Prix as Mercedes' rear wing appeared to deflect as much as the Red Bull component it has been complaining about.
The furore began at the Spanish GP when video footage of Red Bull's wing showed a considerable amount of flex in a straight line under the heavy drag loads exerted onto it.
In Spain, Red Bull changed the rear wing ahead of qualifying after running a higher-downforce package throughout practice.
It remains to be seen if it will deploy a similar tactic in Baku, maybe to hide the extent of its flex ahead of the race to avoid an early weekend protest.
If Red Bull does not do this, then it is hard to see how Mercedes can make a case for such a protest.