Scott Dixon's battle to retain the IndyCar series lead has taken a hit after a crash early into the latest race in Portland.

Dixon was involved in a crash on turn two of the first lap but somehow suffered little damage and will remain in the race.

His only damage was to an antenna meaning his team may struggle to communicate with him throughout the rest of the race.

Dixon began the race in 11th place, well back from fellow title contenders Alexander Rossi, Will Power and Josef Newgarden.

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The Kiwi holds a 26-point title lead over Rossi.

Dixon was sitting in 19th after re-joining the race while Rossi held the race lead.