The Formula 1 regulations state drivers must use both types of tire compounds during every race.
Below is the order in which each driver used his tire compounds in the Spanish Grand Prix, as recorded by Bridgestone:
Team Tyre choice by stint
Ferrari
Felipe Massa Soft Soft Hard
Kimi Raikkonen Soft
McLaren
Lewis Hamilton Soft Soft Hard
Heikki Kovalainen DNF Soft
BMW Sauber
Robert Kubica Soft Soft Hard
Nick Heidfeld Soft Soft Hard
Renault
Fernando Alonso Soft Soft Hard
Nelson Piquet Soft Soft Hard
Toyota
Jarno Trulli DNF
Timo Glock Soft Soft Hard
Scuderia Toro Rosso
Sebastien Bourdais DNF
Sebastien Buemi DNF
Red Bull Racing
Mark Webber Soft Soft Hard
Sebastian Vettel Soft Soft Hard
Williams
Nico Rosberg Soft Soft Hard
Kazuki Nakajima Soft Soft Soft Hard
Force India
Adrian Sutil DNF
Giancarlo Fisichella Hard Soft Soft Soft Soft
Brawn GP
Jenson Button Soft Soft Hard
Rubens Barrichello Soft Soft Soft Hard