Dwain Chambers again failed to record an Olympic 'A' standard qualifying time despite winning the 100 metres at athletics' Primo Nebiolo Memorial meeting in Italy.
A slight tailwind of 0.5metres per second in Turin looked set to provide Chambers with a good chance of running under the 'A' standard of 10.18 seconds.
However, the 34-year-old could only manage a winning time of 10.29secs to finish ahead of Suwaibou Sanneh of Gambia. Britain's Rikki Fifton was eighth in 11.03secs.
Chambers' best time of the season remains the 10.28 he ran when finishing behind triple Olympic champion Usain Bolt in Ostrava on May 25, and the pressure is building ahead of the Olympic trials at the end of June.
Britain's Lawrence Clarke and Andy Pozzi were fourth and fifth respectively in the 110m hurdles, while Tom Parsons could only manage sixth in the high jump with a best of 2.15m.