Antonio Alejandro Díaz Campos (born 26 April 2000) is a Chilean football player who plays as a left wing-back for Universidad de Chile in Chilean Primera División.

Also, he played all the matches and scored a goal for Chile U17 at the friendly tournament Lafarge Foot Avenir 2017 in France, better known as Tournament Limoges, where Chile became champion after defeating Belgium U18[3] and Poland U18[4] and drawing France U18.

[5] He was in the Chile U20 squad for the 2019 South American U-20 Championship, making an appearance at the tournament against Brazil U20.

In addition, with Chile U20 he won the gold medal in the 2018 South American Games.

[6] He was included in the final squad for the 2023 Pan American Games,[7] where Chile won the silver medal.