Maybe Lewis Hamilton was right.

The three-time Formula 1 world champion was critical of the standard of driving in IndyCars after Fernando Alonso's performance at last month's Indy 500.

The driving standards at today's race in Texas backed up the Brit's argument as one driver after another made mistakes that took out innocent bystanders and had a big influence on the championship standings.

Only seven of the 22 cars that started finished the race.

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Kiwi Scott Dixon, who had run in the top three most the race, was taken out by Indy 500 winner Takuma Sato with half a dozen laps remaining when he looked like he was a 50-50 chance of winning the race.

It was a cruel blow for Dixon who would have made a jump over a number of his championship rivals had he go on to finish the final few laps and bank a big haul of points.

Sato made a ridiculous move onto the grass and lost control of his car and slid across the back of Dixon to take the 36-year-old out of contention.

It followed crazy moves by Tony Kanaan and Josef Newgarden among others and really damaged the credibility of the sport.

Australian Will Power survived the carnage to grab victory in what can only be described as a Russian roulette win in what was an embarrassing night for the category.

Kanaan took a penalty but fought his way to finish second with Simon Pagenaud third.

Dixon maintains a narrow championship lead as the series moves to Road America in Wisconsin in a fortnight.