Lausanne: Tyson Gay's hopes of returning from a one-year doping ban with immediate victory were dashed at the Lausanne Diamond League meet on Thursday by fellow-American Justin Gatlin.
An exceptional line-up of track and field stars offered up an evening of high-class competition at the packed Stade de la Pontaise in balmy, windless conditions.
Olympic champion Kirani James set the tone by scorching to the fifth fastest time ever run in the men's 400m, the Grenadian back to the form that saw him top the podium in London two years ago.
And then Gatlin trumped Gay in a scintillating 100m, the former clocking 9.80sec for victory. Only six men have run faster.
"There were definitely nerves there, first race back!" said the 31-year-old Gay, cleared to run after world athletics' governing body, the IAAF, announced last week that it would not appeal the reduced one-year sanction he served for testing positive for a banned anabolic steroid in two out-of-competition tests.