Vettel makes instant impact

Sebastian Vettel announced his arrival in Formula One by setting the fastest time in practice for the Turkish Grand Prix today, in just his second session behind the wheel.

The German stepped up as BMW-Sauber's test driver as part of the reshuffle which followed Jacques Villeneuve's departure.

He made a costly first impression in first practice this morning, earning a £500 pit lane speeding fine just nine seconds into his debut.

But the 19-year-old soon caught the eye for the right reasons and ended up third before topping the timing sheets in this afternoon's second session.

His lap of one minute 28.091 seconds left all his more experienced rivals in the shade, beating his nearest challenger, Ferrari's Felipe Massa, by 0.073secs.

Jenson Button followed up his maiden grand prix win in Hungary three weeks ago with another strong showing today. The Englishman was third in both sessions for Honda.

His team's test driver Anthony Davidson took fourth place, ahead of the Toyota of Ralf Schumacher, who just edged out his brother Michael.

Ferrari ace Michael is locked in a tussle with Fernando Alonso for the world championship and arrived in Istanbul just 10 points adrift.

He claimed bragging rights today after Renault driver Alonso struggled to 12th place after colliding with Robert Doornbos late in the session. David Coulthard was a lowly 28th.

Kimi Raikkonen, who was fastest this morning, could only manage eight in his McLaren in the afternoon session.