Fernández made his Ligue 1 debut on 13 September 2009, starting in a 0–1 loss at Stade Rennais, and scored his first goal in the category roughly a month later in a 3–1 home win against FC Girondins de Bordeaux.
Fernández's professional career began when he made his Ligue 1 debut on September 13, 2009, playing for Stade Rennais in a loss. He then scored his first league goal about a month later in a 3-1 win over FC Girondins de Bordeaux.