Chijindu Ujah finished sixth in his Diamond League debut race in Paris on Saturday.
British sprinter Ujah, 20, who shot to fame with a 9.96 second run in the 100 metres earlier in the year, could only clock 10.20s this time round in a race won by American Michael Rodgers.
Ujah is currently locked in a battle with James Dasaolu for the final spot on Britain's sprint team for the European Championships in August, and this may not have massively impressed the selectors.
The pair are vying to join Dwain Chambers and Harry Aikines-Aryeetey on the plane to Zurich after they finished in the two qualifying spots in the British Championships at the end of June.
Dasaolu missed that race through injury but returned to run an impressive 10.03s in Lausanne two days prior to Ujah's race.
So despite finishing third behind champion Chambers at the trials, Ujah may miss out on the Europeans.
His 9.96s run last month is slower than Dasaolu's personal best - the 9.91s he clocked in Birmingham last year.
Either of the two would fancy their chances of at least a place in the final come August, but only one will get their shot. They only have until July 13 to make their cases, though, as that is the deadline for British entries into the Championships.
The events begin in Switzerland on August 12.
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