Alexander Isak, Eberechi Eze Among 10 Biggest Deals of the 2025 Summer Transfer Window

The 2025 summer transfer window will be remembered not just for its record-breaking fees, but for the seismic shifts it triggered across Europe’s elite clubs. 

With Liverpool and Manchester United leading the charge, and Galatasaray pulling off a stunning coup, the 2025/2026 summer transfer window is one for the ages.

Whether you're tracking the Premier League’s power plays or marveling at Galatasaray’s audacity, this listicle breaks down the 10 biggest deals of the window.

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Tactical Fit: Arteta’s system thrives on positional rotations and vertical progression. Eze offers both, with elite ball-carrying and line-breaking passes.

The forward was signed after Kai Havertz pulled out injured with a knee injury, and it is expected he will most likely be utilised as a touchline left winger, although his versatility will allow him to thrive in central midfield roles, with Arsenal looking for someone capable of producing magical moments.

Tactical Fit: Bayern needed a direct winger with Champions League pedigree. Díaz’s pressing and dribbling make him a natural fit in Vincent Kompany’s high-intensity setup.

Diaz joins following a three-and-a-half year spell at Merseyside, where he won three trophies with the side following his arrival from Porto.

Tactical Fit: Cunha’s hybrid role as a false nine or second striker suits Amorim’s fluid front line. His pressing stats were among the best in the Premier League last season when playing for Wolves.

Tactical Fit: With Isak gone to Liverpool, Newcastle boss Eddie Howe needed a target man with technical flair. Woltemade’s hold-up play and aerial threat offer a new dimension.Woltemade will be expected to lead the line, while challenging for a starting berth with William Osula.

Tactical Fit: Galatasaray’s 4-2-3-1 system revolves around a mobile striker. Osimhen’s pace and finishing make him the ideal focal point.After shining there on loan last season from Napoli, Galatasaray finally made his deal permanent, but at the cost of having to sell one of their training grounds to fund a transfer for the Nigerian.

Tactical Fit: Mbeumo’s dual-footedness and defensive work rate make him a tactical gem. He can play wide or centrally, offering Amorim flexibility.

So far, Mbeumo has already scored two goals for his new club at the time of asking, and looks like a great long-term fit for Man United’s new vision under Ruben Amorim.

Tactical Fit: Sesko is United’s answer to Haaland—a tall, fast, clinical striker. His off-ball movement and pressing align with Amorim’s philosophy.

After missing out on Viktor Gyokeres and Liam Delap, United turned to Sesko as their marquee forward. His Bundesliga form suggests he’s ready for the leap, and Ten Hag’s system could unlock his full potential.

Tactical Fit: Ekitike’s flair and link-up play complement Isak’s movement. He’s expected to rotate across the front three in Arne Slot’s fluid attack.

His move was overshadowed by Isak’s arrival, but early performances have fans buzzing. At nearly half the price of Isak, Ekitike offers immense value. His chemistry with Wirtz and Isak will be key to Arne Slot’s attacking blueprint.

Tactical Fit: Wirtz is the creative hub Liverpool lacked. His vision and final-third passing will be central to Slot’s possession-based approach.

Wirtz’s transfer was a statement of intent. The German playmaker, hailed as the heir to Mesut Ozil’s creative throne, brings vision, technique, and final-third precision. 

Liverpool’s midfield lacked a true No. 10, and Wirtz fills that void. His fee reflects his age (22), ceiling, and Bundesliga dominance. If he adapts quickly, he could be the heartbeat of Liverpool’s next great team.

Tactical Fit: Isak’s intelligent movement and clinical finishing make him the ideal striker for Slot’s system. His chemistry with Wirtz and Ekitike could define Liverpool’s next era.

Liverpool’s need for a clinical striker was glaring, and Isak’s blend of movement, finishing, and link-up play makes him ideal. His arrival capped a transformative window for the Reds, who now boast one of Europe’s most fearsome attacks.

 The pressure will be immense, but Isak’s pedigree suggests he’s ready.