Sunderland have completed the signing of Celtic right-back Adam Matthews for a fee of £2million.
Diego Poyet is determined to establish himself in Slaven Bilic's West Ham side this season and avoid another loan spell.
The 25-year-old centre-back from Madrid is a free agent having recently terminated his contract with relegated Osasuna.
A statement published on Sevilla's official website said Arribas would travel to the Andalusian club's pre-season training camp in Neuruppin, Germany, after passing a medical and putting pen to paper.
Sevilla were rebuffed in a bid to sign Arribas, who made 70 league appearances in two seasons with Osasuna, last summer.