The MotoGP and Moto2 titles may already be wrapped up, but the Moto3 battle will go down to the wire in Sunday's Valencia season finale.

Championship leader Alex Marquez (Honda) heads into the event with a reduced eleven-point advantage over Jack Miller (KTM) after the Australian tormented the Spaniard with a tactical ride at Sepang.

A protest by Marquez's team against Miller's moves was rejected by Race Direction, adding extra spice to a title showdown between two of the most promising up-and-coming stars.

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"It's going to be like the last round of a boxing match," Miller said of the Valencia finale. "The gloves come off and everybody goes for it. It's only Marquez and me now fighting for the championship, so we can either be first or second. All or nothing."

Both riders have claimed nine podiums from the 17 rounds this year, with Miller taking five wins compared with three for Marquez. However Miller has suffered three non-scores, with only two for Marquez.

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Miller is heading straight for MotoGP next year, while Marquez will join reigning champion's Marc VDS in Moto2.