Siebe Van der Heyden, a Belgian player, has joined FC St. Pauli on loan from La Liga club Mallorca until the summer. He made his debut against Augsburg, coming on in the 80th minute to replace the injured right-back Manolis Saliakas. Coach Alexander Blessin described Van der Heyden as 'overmotivated' in his debut performance. Due to injuries to other players, Van der Heyden is expected to be a key player in the upcoming Bundesliga weeks.

Siebe Van der Heyden is set to join Sankt Pauli, where he will reunite with Alexander Blessin. He will undergo medical tests on Wednesday, after which he will sign his contract. It is not specified whether the transfer is permanent or a loan. Previously, Hamburger SV showed interest, and Anderlecht considered him as a left-footed defender, but those transfers did not materialize due to his connection with Union.

Siebe Van der Heyden, who is not in Mallorca's plans, is attracting interest from Sankt Pauli, where he could reunite with Alexander Blessin.

RSC Anderlecht attempted to acquire Siebe Van der Heyden on a loan deal with an option to buy. However, according to Sasha Tavolieri, the transfer will not be completed.