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Portuguese giants secure Polish defender on permanent deal as Arsenal cash in on fringe player

FC Porto have completed the permanent signing of centre-back Jakub Kiwior from Arsenal, with the 24-year-old Polish international committing to the Portuguese champions until 2030.
The deal includes a €70 million release clause, positioning Porto to potentially make a substantial profit on a player who struggled for regular playing time in North London.
Porto's acquisition of Kiwior represents more than just defensive reinforcement. The Dragons are making a calculated bet on a player whose value has been suppressed by limited opportunities rather than limited ability.
Currently sitting second in portugal" class="entity-link entity-link--league">Liga Portugal and preparing for the Champions League knockout stages, Porto needed quality depth to compete on multiple fronts.
The timing is no coincidence. Porto have identified a market inefficiency: a full international with Premier League experience available below his true market value.
Kiwior made just 38 appearances for Arsenal since his €25 million move from Spezia in January 2023. That's less than one match every two weeks, despite being a regular starter for Poland.
Porto's defensive options now include:
The Polish defender brings the perfect profile: young enough to develop, experienced enough to contribute immediately.
Mikel Arteta's Arsenal operate with ruthless efficiency when it comes to squad composition. If you're not in the manager's core plans, you're expendable.
Kiwior found himself trapped behind the William Saliba and Gabriel Magalhães partnership, arguably the Premier League's best centre-back pairing.
Despite his €25 million price tag, Kiwior never truly broke into Arteta's preferred XI. His minutes came primarily in cup competitions and as a makeshift left-back.
When Saliba and Gabriel are fit, they play. It's that simple.
This reality left Kiwior in an impossible position. Too good to waste on the bench, not quite good enough to displace Arteta's first-choice defenders.
By sanctioning this sale, Arsenal are betting on:
It's a calculated risk that prioritises squad harmony and playing time over hoarding talent.
Porto didn't insert a €70 million release clause by accident. This is a club that sold Darwin Núñez for €75 million, Luis Díaz for €45 million, and Vitinha for €40 million in recent years.
The Portuguese giants have perfected the art of buying undervalued and selling high.
Kiwior fits the classic Porto profile perfectly:
Give him 18 months of regular football in Liga Portugal and Champions League, and that €70 million clause could look cheap.
Centre-backs with Kiwior's profile are increasingly valuable. Left-footed, comfortable in possession, proven at international level - these attributes command premiums in today's market.
Porto are betting that regular playing time will remind Europe's elite why Arsenal paid €25 million for him in the first place.
The six-year contract until 2030 gives Porto maximum flexibility. They can develop him slowly or cash in quickly if the right offer arrives.
Kiwior will likely make his Porto debut in the coming weeks as the club chase domestic glory and European progression. For Arsenal, the focus shifts to maintaining their title challenge with a trimmed defensive roster.
The real winner might be Kiwior himself. After two years of sporadic appearances, he gets the chance to rebuild his reputation at a club famous for maximising player potential.
If Porto's track record holds, we'll be discussing Kiwior's big-money move to a European giant within two years. That €70 million release clause exists for a reason.
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The transfer fee has not been disclosed, but Porto signed Kiwior on a permanent deal until 2030 with a €70 million release clause. Arsenal originally paid €25 million for the defender in January 2023.
Kiwior struggled for regular playing time at Arsenal, making just 38 appearances since joining in January 2023. He was trapped behind the William Saliba and Gabriel Magalhães partnership in Mikel Arteta's preferred XI.
Kiwior is a centre-back who can also play as a left-back. The 24-year-old Polish international will strengthen Porto's defensive options as they compete in Liga Portugal and the Champions League knockout stages.