By David Coulthard
BBC F1 co-commentator and former F1 driver
Any driver who has won four races consecutively has gone on to win the World Championship that year. And Lewis Hamilton has now done that twice this season.
They say there are "lies, damned lies and statistics" but nevertheless there is more than momentum behind Hamilton's charge for the championship.
Hamilton's Mercedes team-mate Nico Rosberg continues to show great speed and professionalism, but one big question hangs over him. He has yet to win a wheel-to-wheel battle with Hamilton.
It's not a question of deserving the ch...