Celtic have completed the signing of Haissem Hassan from Real Oviedo on a four-year contract, with an option for a fifth year.
The 24-year-old has passed his medical and signed a deal running until June 2030, with Celtic able to extend his stay through 2031.
His registration remains subject to international clearance. Hassan will wear the number 23 shirt, Celtic confirmed.
The guaranteed payment for the player is understood to be around €7 million, with performance-related add-ons potentially raising the package to €10.5 million.
Part of the additional payment reportedly depends on Celtic qualifying for the UEFA Champions League league phase.
The potential total remains below Hassan’s €12 million release clause, which fell from €18 million following Oviedo’s relegation from La Liga.
As KingFut previously reported, the two clubs had reached an agreement in principle before Hassan travelled to Britain for his medical.
“It is a great moment and a real honour for me to join Celtic,” the winger said. “When I heard about Celtic being interested in me, I had to get here and be part of the club.”
“At Celtic, everything is about winning, and that’s what I want,” he added.
Haissem Hassan said he had followed Celtic while growing up and regularly watched the club compete in the Champions League.
The Paris-born player added that his immediate objectives with the club include retaining the Scottish Premiership, reaching the Champions League and making an impact in Europe.
Real Oviedo signed Hassan from Villarreal for €1.5 million in August 2024. Villarreal retained 40% of the capital gain from his next transfer, meaning they will receive a share of Oviedo’s profit.
Their final payment will depend on the confirmed guaranteed amount and which add-ons Celtic eventually trigger.
Hassan helped Oviedo secure promotion during his first season, scoring four goals. He then featured regularly in La Liga before the club suffered relegation.
The winger began his professional career with Châteauroux before joining Villarreal in 2020. He later spent loan spells with Mirandés and Sporting Gijón.
Born in France to an Egyptian father and Tunisian mother, Hassan represented France at youth level before committing his senior international future to Egypt.
His profile rose during the 2026 World Cup, particularly in Egypt’s round-of-16 defeat to Argentina. Hassan created the Pharaohs’ second goal and also had an individual effort disallowed during the 3-2 loss.
He becomes the first Egypt international to join Celtic’s men’s first team and their third major attacking addition of the summer after Camilo Durán and Kasper Høgh.