Davies began playing football at aged six,[5] and joined the women's section of Wimbledon FC as a 10-year-old in 1998.[6] In summer 2004, Davies was approached by Fulham. She decided to stay with AFC Wimbledon but changed her mind when approached again in September 2004.[6] After two years at Fulham, Davies moved to Chelsea in 2006.[5][7]
Davies represented England at the Under-15, 17, 19, 21 and 23 levels.[5] However, she was called into the Wales squad in March 2010 as her grandfather had been born in Pontardawe.[10] Davies made her senior debut for Wales as a 90th-minute substitute, against Belgium that month.[3]