 The player was handed the number 7 shirt by the club.On 28 January, Martínez came on as a substitute to score his first goal for the U's in a 3–0 home win over Newcastle United in the fourth round of the FA Cup.He made his league debut on 5 February in an away fixture against local rivals Swindon Town, a game which Oxford won 2–1, and scored his first league goal, a late consolation goal in a 3–2 home defeat at the hands of league leaders Sheffield United, on 7 March.