Greek swimmer Kristian Gkolomeev earned a $1 million bonus for beating a world record while sprinter Fred Kerley won a weak 100m as the drug-friendly Enhanced Games made a hyperbolic debut at a casino car park in Las Vegas on Sunday.

As Cam McEvoy’s world record time becomes a focal point Las Vegas, swimmers say the lure of million-dollar bonuses outweighed concerns over drugs, reputation and risk.

Two-time Olympian Hunter Armstrong has pocketed $350,000 for less than 25 seconds work in Las Vegas.