According to Mateusz Borek, who was told by the player's agent Mariusz Piekarski, Atletico Madrid and Real Betis are strongly pursuing Oskar Pietuszewski. The 17-year-old winger is under contract at Jagiellonia Bialystok until June 2027 and has 3 goals and 2 assists in 17 appearances this season. Jagiellonia's asking price was cited as €11 million during talks in December 2025, while a minimum asking price of €15 million was reported in November 2025.