Kazan - British swimmer Adam Peaty faces an uphill battle to have his 50m breaststroke world record ratified.
The mark of 26.62 seconds was set nearly a year ago at the European Championships in Berlin but hasn't been approved by FINA because Peaty was not tested at the time for the blood-booster EPO.
FINA honorary secretary Paolo Barelli, who is in charge of the issue, says it was a simple administrative error because a box was not checked on the drug-testing form.
Barelli suggests British Swimming appeal to the Court of Arbitration for Sport. He says, "They have every reason to."
In the meantime, South Africa's Cameron van der Burgh keeps his record of 26.67 set in 2009.
The 50m breaststroke is not an Olympic event.