Borussia Mönchengladbach is a Bundesliga club that is seriously interested in Jan Leszczyński. It is reported that the German team is looking to capitalize on Legia Warszawa's need to sell players to address a budget deficit, potentially allowing them to sign the defender on favorable terms. The team managed by Eugen Polanski is attempting to negotiate a satisfactory agreement with Legia. It is understood that an offer has already been made for the 19-year-old central defender. Leszczyński is a Polish U19 international with four caps. He joined Legia in May 2024 and holds a contract until June 30, 2029. He made four appearances in the 2025/2026 Ekstraklasa season. Transfermarkt estimates his current market value at €600k.