After growing up in
Córdoba, Calles graduated in sports science in
Granada. In 2012, Calles moved to Germany to work for the
Artland Dragons, first as athletic trainer and a year later as assistant coach. In 2015, he moved to
Rasta Vechta. After the team was promoted from the
ProA in 2017–18, Calles was named head coach of the team. In the 2018–19 season, Calles had the most successful season ever in the history of Vechta. The team reached the semifinals of the playoffs, eliminating
Brose Bamberg in the quarterfinals. Calles was named the
Basketball Bundesliga Coach of the Year. In the 2019–20 season, Calles made his European coaching debut in the
Basketball Champions League campaign with Rasta. On 26 June 2020, Calles signed a two-year contract as head coach of the
Hamburg Towers. He guided the Hamburg team to two consecutive quarterfinal appearances in the German Bundesliga. In May 2022, he signed a three-year deal with fellow Bundesliga side
EWE Baskets Oldenburg. He was dismissed by the Oldenburg team on 4 November, 2024. In March 2025, Calles was named head coach of
Alba Berlin after the team dismissed
Israel Gonzalez. ==References==