London, July 18 : Lewis Hamilton has admitted that he is a bag of nerves before every race.
The McLaren star, 23, said: "I am only human. There are nerves, but I'm never thinking I might fail. 'They are nerves of excitement."
Hamilton heads into Sunday's German Grand Prix at Hockenheim leading the drivers' championship on count back after his home win at Silverstone, The Sun reported.
But the Brit insisted: "There are still nine races to go and I have to focus on them."
German Sebastian Vettel will join Red Bull next year from Toro Rosso as successor to David Coulthard, who retires at the end of the season.