Chidinma Okeke was defensively impressive in Madrid's 1-0 win over Michaela Abam's Real Betis in a Spanish Liga Iberdrola encounter on Sunday.
The 19-year-old Super Falcons fullback had completed her switch on Friday and was hoping to help her side to a winning start in their opener.
The 2019 Women's World Cup breakout star earned a starting place for Madrid at the Estadio Municipal Nuevo Matapinonera.
After a goalless first half, Oscar Fernandez's side, who was aiming to avoid another home defeat against Betis, left it late to secure the winner through Estela Fernández in additional time.