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ELROY, Texas -- More than 58,000 fans watched Friday's first round of Formula 1 practice sessions at Circuit of The Americas.

Scuderia Ferrari s Fernando Alonso clocking the fastest time of 1:38.343 during practice session one. Reigning World Champion driver Sebastian Vettel of Infiniti Red Bull Racing ruled the time sheets in session two, with a top time of 1:37.305.

Qualifying sessions begin on Saturday.

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