Formula 1 testing: Lewis Hamilton upbeat despite reliability problems

Lewis Hamilton, Jenson Button and Fernando Alonso review day two of the final pre-season test in Bahrain.

Red Bull finally showed some pace as reliability problems hit early favourites Mercedes, who were forced to curtail running early for a second successive day with Hamilton stopped by a gearbox problem after completing 89 laps.

Red Bull's Daniel Ricciardo was third fastest - behind Force India's Sergio Perez, who was fastest for the second consecutive day and Ferrari's Fernando Alonso.

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