On 1 May 2025, Athletic Club player Yeray Álvarez underwent an in-competition doping control carried out by UEFA following a UEFA Europa League match. The analysis of the player's sample by a WADA-accredited laboratory revealed the presence of Canrenone, which is a substance prohibited in- and out- of competition under the category S5. Diuretics and Masking Agents of the 2025 WADA Prohibited List.