Martin Brundle was roundly ignored by superstar musician Usher on his pre-race grid walk before the Saudi Arabian Grand Prix . The awkward moment came after the Sky Sports favourite cut another interview short because of the broadcaster's advertising rules. Brundle has become famous for his pre-race grid walks. His unrivalled knowledge of Formula 1 always makes it an informative segment, but often more memorable are those moments when he has run-ins with famous faces. And another happened in

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