Midfielder Jessica Fishlock scored a superb solo goal to give Wales victory over Mexico in their second Group C game of the Algarve Cup in Portugal.
Fishlock's superb run from the halfway line and strike gave Wales a 1-0 lead at half-time.
Goalkeeper Nicola Davies, who is without a club, pulled off a string of saves to secure a Welsh victory.
This was Wales' first win of the tournament after their defeat to hosts Portugal.
Wales midfielder Hayley Ladd was sent off during the 2-0 defeat to hosts Portugal in their opening match of the tournament on Wednesday.
Ladd was sent off for a second yellow card and was unavailable for Wales' match against Mexico.
Jarmo Matikainen's Wales side play Hungary in their final Group game on Monday.
Wales Womens team: Nicola Davies (Unattached), Rhian Nokes (Cardiff City Ladies), Kulie Davies (Chelsea), Lauren Hancock (Cardiff City Ladies, Carys Hawkins (Sunnana SK), Danielle Oates (Blackburn), Lauren Price (Cardiff City FC), Nicola Cousins (Cardiff City Ladies), Loren Dykes (Bristol Academy), Jessica Fishlock (Seattle Reign FC), Michelle Green (Cardiff City Ladies)
Subs: Sophie Ingle (Chelsea), Angharad James (Bristol Academy), Rachel Hignett (Bristol Academy), Sarah Wiltshire (Watford), Megan Wynne (Watford), Natasha Harding (Bristol Academy), Shan Jones (Caernarfon Ladies), Helen Ward (Chelsea), Amy Thrupp (PILCS), Amy Wathan (Cardiff City)