Did Jakub Krzewina run into the Black Forest? [1] The whereabouts failure cases in doping are more like a black swan than bread and butter and can be counted on one hand.[2] Therefore, the recent CAS award in Krzewina case (CAS 2021/A/8459)[3] can be considered to be a vital judiciary voice regarding the application and interpretation of Article 2.4 World Anti-doping Code (2021)[4]: ‘Any combination of three missed tests and/or filing failures, as defined in the International Standard for Testing and Investigations, within a twelve-month period by an Athlete in a Registered Testing Pool.’ […]