The Gunners have today unveiled their second signing of the January transfer window in a £20million deal with Italian club Spezia.
Past Arsenal players to don the squad number include Denilson, Alex Oxlade-Chamberlain and most recently Ainsley Mailtand-Niles, who is currently on loan at Southampton.
A club statement read: “The 22-year-old Polish international defender, who made 43 appearances during his time with the Italian side, was part of the national team squad at the recent FIFA World Cup in Qatar.
“Jakob spent his youth career at Polish club GKS Tychy and then in Belgium with Anderlecht before moving to Slovakian side FK Zeleziarne Podbrezova as an 18-year-old. After spending a season there, Jakub moved to MSK Zilina where he made 46 appearances during his two seasons with the Slovakian club.
“His strong performances resulted in the left-sided central defender moving to Spezia in August 2021, where he had become a regular in the Serie A club’s starting line-up. During his time in Italy, Jakub made his full international debut and has now made nine appearances for Poland.”