Ajax attempted to sign left winger Borja Sainz from FC Porto. The Amsterdam club submitted a bid for the 25-year-old Spaniard, who joined Porto in July 2025, but it was rejected by the Portuguese team. The team was unwilling to let the player depart. Sainz's contract runs until mid-2030. According to Transfermarkt, he has a market value of twenty million euros. He has made 5 appearances for Spain's U19 team, scoring 3 goals. Athletic Club has also been linked with the player.