Dutch superbike rider Michael van der Mark will replace injured Valentino Rossi for the Aragon round of the MotoGP.
Britain's Jack Harvey will make his IndyCar road course debut this weekend at the famous Watkins Glen circuit.
Seven-time motorcycle world champion Valentino Rossi has broken his right leg in two places in an enduro training accident in Italy.
Multiple world champion Angel Nieto has died aged 70, a week after he was involved in a quad bike accident.
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