Arruabarrena made her debut appearance on the
ITF Circuit at Les Francqueses del Valles, France, where she lost in first round against her compatriot Lucia Cervera-Vazquez, in straight-sets. In July 2008, she won her first ITF title on a $10k event in Oviedo. In the final, she defeated Hermon Brhane, in straight sets. Arruabarrena made her
WTA Tour main-draw debut as a qualifier at the
2011 Andalucia Tennis Experience, defeating
Monica Niculescu and
Sandra Záhlavová, before losing to second seed
Svetlana Kuznetsova. She won her first WTA title at the
2012 Copa Colsanitas in
Bogotá, beating
Alexandra Panova in the final. Arruabarrena claimed her second WTA trophy at the
2016 Korea Open, overcoming Monica Niculescu in the final in three sets. She reached the final of the
2017 Copa Colsanitas, losing to wildcard entrant
Francesca Schiavone. Arruabarrena was also runner-up at the
2018 Copa Colsanitas, losing in the final to
Anna Karolína Schmiedlová. Having not played since January 2022, she announced her retirement from professional tennis in August that year. ==Performance timelines==