It seems Ferrari's testing in Italy has paid off as Fernando Alonso topped the times in Barcelona. Alonso, with a time of 1min24.430 seconds, led the opening session by three-tenths of a second ahead of Red Bull's Sebastian Vettel (1min24.808s).
Sauber's Kamui Kobayashi was third fastest with a time of 1min24.912s , followed by McLaren's Jenson Button in forth (1min24.996s).
Williams tester Valtteri Bottas finished with a time of 1min25.120s ahead of Mercedes' Michael Schumacher in sixth (1min25.187s).
Spanish Grand Prix: First practice session times
1 Fernando Alonso Ferrari 1min24.430 seconds
2 Sebastian Vettel Red Bull Racing 1min24.808s
3 Kamui Kobayashi Sauber 1min24.912s
4 Jenson Button McLaren 1min24.996s
5 Valtteri Bottas Williams 1min25.120s
6 Michael Schumacher Mercedes 1min25.187s
7 Romain Grosjean Lotus 1min25.217s
8 Lewis Hamilton McLaren 1min25.252s
9 Kimi Räikkönen Lotus 1min25.285s
10 Nico Hulkenberg Force India 1min25.339s
11 Jean-Eric Vergne Toro Rosso 1min25.367s
12 Felipe Massa Ferrari 1min25.433s
13 Mark Webber Red Bull Racing 1min25.539s
14 Nico Rosberg Mercedes 1min25.607s
15 Sergio Perez Sauber 1min25.918s
16 Daniel Ricciardo Toro Rosso 1min26.226s
17 Pastor Maldonado Williams 1min26.297s
18 Jules Bianchi Force India 1min26.630s
19 Vitaly Petrov Caterham 1min27.475s
20 Timo Glock Marussia 1min28.267s
21 Alexander Rossi Caterham 1min28.448s
22 Charles Pic Marussia 1min28.633s
23 Pedro de la Rosa HRT 1min29.107s
24 Dani Clos HRT 1min31.618 7.188s
Sauber's Kamui Kobayashi was third fastest with a time of 1min24.912s , followed by McLaren's Jenson Button in forth (1min24.996s).
Williams tester Valtteri Bottas finished with a time of 1min25.120s ahead of Mercedes' Michael Schumacher in sixth (1min25.187s).
Spanish Grand Prix: First practice session times
1 Fernando Alonso Ferrari 1min24.430 seconds
2 Sebastian Vettel Red Bull Racing 1min24.808s
3 Kamui Kobayashi Sauber 1min24.912s
4 Jenson Button McLaren 1min24.996s
5 Valtteri Bottas Williams 1min25.120s
6 Michael Schumacher Mercedes 1min25.187s
7 Romain Grosjean Lotus 1min25.217s
8 Lewis Hamilton McLaren 1min25.252s
9 Kimi Räikkönen Lotus 1min25.285s
10 Nico Hulkenberg Force India 1min25.339s
11 Jean-Eric Vergne Toro Rosso 1min25.367s
12 Felipe Massa Ferrari 1min25.433s
13 Mark Webber Red Bull Racing 1min25.539s
14 Nico Rosberg Mercedes 1min25.607s
15 Sergio Perez Sauber 1min25.918s
16 Daniel Ricciardo Toro Rosso 1min26.226s
17 Pastor Maldonado Williams 1min26.297s
18 Jules Bianchi Force India 1min26.630s
19 Vitaly Petrov Caterham 1min27.475s
20 Timo Glock Marussia 1min28.267s
21 Alexander Rossi Caterham 1min28.448s
22 Charles Pic Marussia 1min28.633s
23 Pedro de la Rosa HRT 1min29.107s
24 Dani Clos HRT 1min31.618 7.188s