Roberto represented the Spain national team for nearly one decade, appearing at one World Cup and one European Championship.

After two years, he moved to another club in the community, Valencia CF, proceeding to total 33 La Liga goals in his first four seasons but suffering relegation in 1986.

He scored ten times in 40 matches in his debut campaign,[1] including a penalty in a 2–1 home win against Real Madrid,[2] which won that year's league ahead of the Catalans.

[1] Subsequently, after more than 700 official games, Fernández moved into coaching, being in charge of lowly Valencia B, Orihuela CF and UD Alzira in his native region.

[10] Fernández earned 29 caps and scored one goal for Spain in nine years, and was included in the squad for the UEFA Euro 1984 and the 1990 FIFA World Cup tournaments.