Sergio Perez has not yet driven a race for the Red Bull team, but there is already a lot of speculation about his role within the team and the possible successes of his signing. Ernest Knoors, a former F1-engineer and BMW-team-boss, now also lights the veil on his collaboration with Perez when both worked for the Sauber team.  "I know Sergio, because I worked with him when it was still called Sauber, with the Ferrari engines", Knoors begins. About his collaborations with Perez, he remembers the following: "He is really good on Sundays, but technically, in terms of feedback, I wouldn't count him among the best.” Read more Perez: “It will always be my favourite...
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