Anton Artyomovich Efremov (Russian: Антон Артёмович Ефремов; born 11 June 2003) is a Russian professional footballer who plays as a central defender for Spanish club Sestao River on loan from Villarreal.

[1] Despite the reports, FC Lokomotiv Moscow moved faster and signed the player where he spent 3 seasons.

In the 2019–20 season, his first year as a youth, he remained on Villarreal training with Juvenil A but was unable to debut in the league due to bureaucratic delays with his visa in Spain.

This tired the player who returned to Russia to play for the FC Chertanovo Moscow academy where he received the opportunity to debut in the Russian Football National League on 17 October 2020 in a game against FC Veles Moscow at only 17 years old, just started his youth stage.

On 30 August 2024, Efremov joined Sestao River in the third-tier Primera Federación on a season-long loan.