Fifth place finish means next race crucial
Kiwi Scott Dixon has finished fifth in the Detroit Belle Isle Grand Prix in the US this morning (NZ time).
As a result, his IndyCar Series lead has been trimmed from 43 to 30 points heading into the last race next Monday in Chicago.
Dixon started the 90-lap race on pole but pitted early and never regained the lead.
The race was won by England's Justin Wilson with Dixon's main championship rival, Brazilian Helio Castroneves, second.
Castroneves, who started today beside Dixon on the front row, assumed the lead after 18 laps when the New Zealander unexpectedly entered pit lane.
Dixon re-entered the race in 18th position and quickly improved to fifth while Castroneves built a lead of 16 seconds over Dixon after 55 laps.
Castroneves continued to set the pace until he was penalised for blocking on the 73rd lap, with officials ordering him to relinquish the lead to second-placed Wilson.
The ruling effectively cost Castroneves 10 points, which could prove crucial as he attempts to overhaul Dixon in Chicago.