Bradley Wiggins has received a 'strike' for the equivalent of a missed drugs test.
The Daily Mail reported Wiggins recorded a filing failure prior to the Rio Olympics where he won his fifth gold and British record eighth medal in all.
Athletes must give their whereabouts for one hour each day so they can be available for drug testing.
And Wiggins attributed the failure to confusion surrounding time differences on his return from May's Tour of California, the Daily Mail reported.
Wiggins' spokesman confirmed the missed test, but would not comment further.
Missed tests are not uncommon. Lizzie Deignan (nee Armitstead) successfully appealed to the Court of Arbitration for Sport against a ban for three missed tests within one year. Two are permitted in 12 months but a third triggers a suspension and possible two-year ban.
