Kiwi IndyCars driver Scott Dixon has finished sixth in this morning's race at Belle Isle in Detroit to hold his championship lead.

The 36-year-old recorded a second place finish in yesterday's race at the same street circuit in inner-city Detroit despite battling a broken bone in his ankle that he picked up in his horror Indianapolis 500 crash a week ago.

Dixon started eighth but lost eight seconds at a pit stop due to an issue refueling his car. He fought his way up a few places to bank some valuable championship points in the second half of the race.

Graham Rahal survived a late red flag that bunched the field up to win the race to complete a double for the weekend. He became the first driver to sweep the weekend in Detroit.

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Josef Newgarden was second, Will Power third and Indianapolis 500 winner Takuma Sato fourth.

The series move to Texas Motor Speedway next week.