Hamilton laments 'shocking' Japanese Grand Prix

Lewis Hamilton says he had a "shocking" race after finishing fifth in the Japanese Grand Prix at Suzuka and being involved in another collision with Ferrari's Felipe Massa's.

Hamilton explains he had "no idea he was there" after the minor contact, vowing to "keep his head up" after a dissappointing weekend.

He also congratulates Sebastian Vettel on his second successive world championship.

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