Senderos made only two appearances for Arsenal in 2009–10, both in the League Cup, and on 25 January 2010, he joined Everton on loan for the remainder of the season, where he wore the number 23, vacated by the departure of Lucas Neill. He made his first appearance for the club in a 1–0 win away against Wigan Athletic. He returned to Arsenal at the end of the season having made only three appearances, two in the Premier League and one in the UEFA Europa League.