On 28 August 2017, Mr. Matthew Willenbring (USA) was tested positive during the FINA World Junior Championships in Indianapolis (USA) for the substance Hydrochlorothiazide (Class S5 Diuretics and Masking Agents).

Mr. Matthew Willenbring was sanctioned with a four (4) month ineligibility period in accordance with FINA DC Rule The sanction started on 19 October 2017, the day his voluntary provisional suspension commenced.

All individual results achieved by Mr. Matthew Willenbring from 28 August 2017 shall be annulled together with the consequence thereof (forfeiture of medals/prizes, reimbursement of prize-money).