Prior to her career in football, Fontemanha played tennis. Following a season in which she broke into Boavista's senior team, it was announced, on 6 August 2014, that she would be transferring to Spanish clubAtlético Madrid. Following two seasons in Madrid, she joined Sporting CP in Portugal. At Sporting, she played predominantly as a full-back. In June 2018, Fontemanha extended her contract with Sporting, committing herself to the club until 2022.