Gibbs clipped Steve Kirby straight to Key at short mid-wicket but was called for over-stepping, and Gibbs compounded the home team's misery by slamming the free delivery over the top for four.
Again she broke at the first opportunity before handing the initiative straight back, but the key this time was that Robson managed to consolidate the next break to lead 4-1.
The teams run their cars here with less aerodynamic downforce than at any other circuit and finding the right balance between straight line speed and cornering is key.