Formula 1 testing: Felipe Massa fastest on day one in Barcelona
Williams's Felipe Massa was fastest on day one of final pre-season testing in Barcelona on Thursday.
Britain's Lewis Hamilton had been leading the way at Circuit de Catalunya but a problem in his Mercedes car's hybrid system limited his running to just the morning.
Meanwhile, McLaren chairman Ron Dennis held a press conference to explain the current situation with driver Fernando Alonso, who will not be taking part in the final test this weekend.
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