Ivan Mesík joined the Addicks in June 2026 from Dutch side Heracles Almelo for an undisclosed fee.

Born in Banská Bystrica, Slovakia, Mesík began his youth career at hometown club MFK Dukla Banská Bystrica before joining Spartak Trnava, where he earned his professional debut in May 2019.

Following an impressive 2019/20 campaign, the left-sided defender signed a five-year deal with Danish Superliga side Nordsjælland.

Loan spells followed in Norway at Stabæk Fotball and Odds BK before Mesík earned his first call-up to the Slovakia senior team in the summer of 2022.

After two successful seasons with Italian side Pescara, he moved to Heracles in June 2024 and has since earned 63 Eredivisie appearances.