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Barcelona - Sebastian Vettel went out of his way on Friday to slam speculation that Ferrari are set to dismiss team boss Maurizio Arrivabene after failing to win a race this season.
The four-time champion German driver, who was first and fourth in Friday's two practice sessions, said he supported Arrivabene, adding that he is doing "a very good job".
The team's technical director, James Allison, has been touted, by the Italian media, as a replacement.
'He's the boss'
Vettel told reporters: "He's the boss. He's doing a very good job. He's leading the team.
"I know there have been some rumours and some 'b-------' lately, but we are very happy that he is with us, and not with somebody else.
"He is reachable, accessible to all the people. He spends a lot of time with the team, not just here, but also in Maranello."
Arrivabene has conceded there is pressure on Ferrari to perform and win again soon - they have not won since Vettel was victorious in Singapore in September last year.