Vettel happy with new Red Bull

World champion Sebastian Vettel and McLaren's Jenson Button talk to BBC Sport following the second day of the final pre-season test in Barcelona.

Button finished the day second-fastest in mixed conditions behind Lotus driver Romain Grosjean, with Vettel fourth quickest.

Red Bull's Vettel says the car is at a better point than this time last season, ahead of the first race of the season in Australia in a fortnight's time, while Button feels further testing over the weekend will be "important" to make any improvements.

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