Xiker Ozerinjauregi Mendikoetxea (born 30 January 1997), known as Xiker, is a Spanish professional footballer who plays as a central defender for CD Ebro. Xiker began his footballing career in 2007 when he joined the academy of Athletic Bilbao. He progressed through the club's youth and reserve sides over the course of the next nine years before being halted by a serious injury. Following his recovery, he spent a season each at Segunda División B clubs Toledo and Peña Sport before joining Real Sociedad B in 2018. He then enjoyed brief spells with Cornellà, Real Betis B and Sabadell, before joining Ebro in 2020.