Gustavo Puerta, a 22-year-old Colombian midfielder, is the subject of negotiations with Betis Sevilla. He has a release clause set at €16m, although Racing Santander would be willing to negotiate on offers starting from €10m. Leverkusen retains a 50% sell-on clause. Puerta's contract is valid until 2029. The Colombian international has 5 caps and has scored 1 goal for his country. In the 2025/2026 LaLiga2 season, he made 32 appearances, scoring 3 goals and providing 1 assist. His current market value on Transfermarkt is €5.00m.