After an impressive opening season, the GP3 Series kicks off its sophomore year at Istanbul Park this weekend. Glenn Freeman picks out the drivers to keep tabs on.

The second GP3 Series gets underway in Turkey this weekend with another talented crop of youngsters aiming to emulate the achievements of last year's champion Esteban Guttierez and runner-up Robert Wickens.

Top 10 drivers to watch

#2 Valtteri Bottas

Age: 21

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