Michal Karbownik joined Albion on transfer deadline day in summer 2020 from Legia Warsaw, signing a four-year deal.
The 19-year-old was immediately loaned back to Legia, where he had won the Ekstraklasa the campaign before.
The 2019/20 season proved to be Karbownik's breakthrough year, making his debut in August 2019 and quickly establishing himself in the team as an adaptable player; he can play on either side of defence as well as in midfield.
His key role in the Legia title winning side saw him named Ekstraklasa Best Youngster of the Season, as well as making the 40-player shortlist for the Tuttosport Golden Boy award, which would go onto be won by Borussia Dortmund's Erling Haaland.
Karbownik's ability was not only spotted by Albion, but by the Poland senior side, whom he made his debut for a day after signing for Graham Potter's team, in a 5-1 demolition of Finland.
Potter updates on Caicedo, Karbownik and Propper
The boss with the latest on three of his players.
Internationals: Who's going where?
Albion players start their World Cup qualifying campaign this week.
Karbownik has big potential, says Moder
Polish pair made their debuts on Wednesday in FA Cup.
Albion's transfer window in full
We take a look at all the deals after the transfer window closed on Monday.