Feyenoord is currently going all out to sign Mika Mármol as a reinforcement for their defense. The Spanish defender, whose contract with UD Las Palmas is about to expire, has received a serious offer from the Rotterdam club. However, competition in the transfer market is fierce, with interest from clubs like SC Braga and Olympiakos. If Mármol's transfer does not go through, Feyenoord already has three alternatives in mind. The club urgently needs a left-footed center-back, especially after the departure of Dávid Hancko and the injury to Malcolm Jeng. Technical director Dévy Rigaux is closely involved in the negotiations and needs to act quickly. One of the most obvious alternatives is Maas Willemsen from sc Heerenveen, who has had an excellent season. With an ETV of 1.8 million euros, he is an affordable option, although Heerenveen has a strong negotiating position. Another option is Fedde Leysen, who currently plays for Union Sint-Gillis and is well-known in the Netherlands. With his young age and potential, he could be a valuable addition for Feyenoord. The club must decide quickly to secure these talents.