West Ham United have secured Switzerland defender Nadine Riesen on a three-year contract following her exit from Eintracht Frankfurt. The 26-year-old full-back made 69 appearances for Frankfurt in the Frauen-Bundesliga and brings Women's Champions League experience to the Hammers. She joins manager Rita Guarino's summer rebuild as the fourth addition, alongside Katie Zelem, Constance Picaud and Laia Codina.

Riesen has earned 42 caps for Switzerland since her 2019 debut and featured prominently at Euro 2025, scoring against Norway. The versatile defender praised West Ham's 'proud history' and described the move as a 'massive opportunity' to develop in one of the world's best leagues. Her attacking quality and pace caught Guarino's attention during the recruitment process.

The Swiss international brings proven international credentials to a West Ham side looking to strengthen their defensive options ahead of the new Women's Super League campaign. Guarino highlighted Riesen's 'never-say-die attitude' as a key factor in her decision to sign the versatile full-back.

This signing demonstrates West Ham's ambition to compete at the top level of English football, adding a player who has already proven herself on the European stage with both club and country.