Even in practice, Piquet suffered noticeably and became physically sick; he later got a 90-minute massage from Sugar Ray Leonard's masseur to help sort out his troubled back and "Las Vegas neck."
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The track, created on the parking lot of the Caesars Palace hotel, had a smooth surface and provided speeds averaging over 100 mph, as well as plenty of overtaking opportunities.
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Warwick also qualified only once; at the season-closing Caesars Palace Grand Prix in Las Vegas.