As the weather worsened, it turned out that full wet tyres were required, rather than intermediates.
By lap 19, rain had started to fall and most of the drivers pitted for wet tyres.
However, at this stage there was no standing water on the track, and so the wet tyres started to wear out very quickly.
Under conditions of rain, there is no limit to how many sets of wet tyres that can be used.
All drivers chose to start on the intermediate wet tyres.
With heavy rain on race day, through good use of an extreme wet tyre he finished 3rd, achieving his first podium since 2005.
Starting the race behind the safety car due to heavy rain requires cars to be fitted with wet tyres until they pit.
The race began under rain conditions, so everyone went for wet tyres.
In addition, each driver had to surrender one set of wet tyres to avoid gaining any advantage.
The was resumed on a damp track with the cars now sporting wet tyres.