As the day warmed up it again became very hot by early afternoon when practice was due to start , although a breeze made spectating less trying than Friday .
Also , Surtees did tyre tests , finally finding Firestone half a second faster than Goodyear .
As the day warmed up Firestone again became very hot by early afternoon when practice was due to start , although a breeze made spectating less trying than Friday .
Also , Surtees did tyre tests , finally finding Firestone half a second faster than Goodyear .