Dix timed 20.02 seconds on a still, overcast evening, leaving Marvin Anderson of Jamaica trailing by more than a half-second.

Olympic champion Usain Bolt’s 19.86 in Oslo last month and fellow Jamaican Nickel Ashmeade’s 19.95 in Kingston are the only faster legal times in this world championships season.

Dix raced in Europe for the first time this season after winning national titles over 100 and 200 meters.

Dix was the meet’s star attraction when pole vault world record holder Yelena Isinbayeva withdrew after warming up.

Isinbayeva told the Lucerne crowd she hurt her hand on landing.