Done deal · 2026

Francisco Sierralta joins Piast Gliwice on loan (option to buy)

Auxerre → Piast Gliwice · Loan + option to buy · Value €2m · Confirmed

Confirmed 9 Sept 2026

Francisco Sierralta, a defender, has joined Piast Gliwice on loan from Auxerre, with an option to buy, confirmed 9 Sept 2026. The deal is now settled in Transfer Tracker's Done Deals record.

Who broke it: Flavien Trésarrieu, 9 Sept 2026, on completion day.

How the deal happened

• Interest · not reported
• Talks · not reported
• Agreed · not reported
• Here we go · not reported
• Signed · 9 Sept 2026 · Flavien Trésarrieu

More business at Piast Gliwice and Auxerre

• Axel Tuanzebe: Burnley → Auxerre · Free · 1 Sept 2026
• Cameron Archer: Southampton → Auxerre · Loan · 1 Sept 2026
• Theo Bair: Auxerre → Bolton Wanderers · Loan + option to buy · 1 Sept 2026
• Pierre Ekwah: Saint-Étienne → Auxerre · Loan · 26 Aug 2026
• Elisha Owusu: Auxerre → Erzurumspor · €1m · 18 Aug 2026
• Rémy Labeau Lascary: Lens → Auxerre · Loan fee €2m · 26 Jul 2026
• Lassine Sinayoko: Auxerre → Paris FC · €8m · 20 Jul 2026
• Christ Makosso: Luton → Auxerre · €2m · 15 Jul 2026

• Francisco Sierralta profile, value & stats
• Piast Gliwice transfers & squad
• Auxerre transfers & squad
• Done Deals · every completed transfer & spend tracker

See the full completed-deal record and more business at both clubs. Open on transfertracker.ai