The price of aging utility at the Emirates

Arsenal selling Leandro Trossard to Besiktas for a fee of £17 million represents a clinical piece of squad management. It is a decision that strips emotion from the ledger, prioritizing peak athletic output over sentimental attachment. Trossard was a reliable weapon, but his physical regression is already visible in the tracking data.

Tracking databases show his sprint volume dropped by 18% in the final third over the last twelve months. He frequently settled for static, slow-tempo possessions rather than driving to the byline.

The Belgian ends his Gunners career with 123 appearances and 27 goals across all competitions. While those numbers suggest a vital contributor, the year-on-year trajectory in the Premier League shows a clear decline.

He scored 12 goals in the 2023/24 season, which dropped to 8 in 2024/25, and fell further to 6 in 2025/26. The downward curve is undeniable.

His expected goals (xG) per 90 minutes fell from 0.38 in his first full season down to a meager 0.19 last term. The efficiency that once defined his cameo appearances has evaporated.

Mikel Arteta is shifting Arsenal's tactical blueprint toward high-intensity transition players who can sustain physical duels. Trossard, at 31 years of age, no longer fits that physical criteria.

As BBC Sport reported, the agreement to sell him to Besiktas was reached after the player accepted the move. This sale creates both squad space and financial room for a much younger profile.

The vanishing impact of the super-sub

For two seasons, Trossard was Arsenal's ultimate game-changer from the bench. He accumulated 14 goal involvements as a substitute since joining the club in January 2023.

These vital interventions rescued points against Chelsea, Everton, and Bayern Munich. Yet, this efficiency was unsustainable.

During the 2025/26 campaign, Trossard's impact off the bench declined sharply. His touches in the opposition penalty area dropped from 5.4 per 90 minutes in 2023/24 to 3.8 last season.

Opposing defensive blocks adjusted to his tendency to cut inside onto his right foot. He became predictable, and his shot conversion rate fell from a stellar 22% down to just 11.5%.

He often failed to find space between the lines when playing against low blocks, restricting Arsenal's passing angles. His pass completion rate in the final third dropped to 72%.

Arsenal's title-winning campaign in 2025/26 masked some of these squad depth limitations. However, their defeat in the Champions League final exposed a lack of dynamic wide players who can beat defenders in isolation.

Selling Trossard now ensures Arsenal avoid paying high wages to a declining asset. It allows them to pivot immediately to the transfer market.

Enter Christos Tzolis: The Belgian Pro League's standard

With Trossard departing, Arsenal have initiated official contact for Club Brugge winger Christos Tzolis. The 24-year-old Greece international is coming off an extraordinary season in Belgium.

He was recently named the 2025-26 Belgian Footballer of the Year after recording 17 goals and 23 assists in 36 league games. Those numbers represent a massive output that demands attention.

His underlying numbers are even more impressive, showing an expected assists (xA) tally of 18.4, the highest in the Belgian league. He was the main engine of Brugge's offense.

Tzolis is not a flash in the pan. During the 2024/25 campaign, he recorded 21 goals and 16 assists in 56 appearances across all competitions.

A year prior, he scored 22 goals in 30 league games while on loan at Fortuna Düsseldorf. His consistency across three different seasons demonstrates a player ready for the Premier League.

He has shown he can produce in different tactical setups, playing as a wide forward in Düsseldorf's counter-attacking system and as a dominant possession-winger in Bruges. This adaptability makes him an ideal tactical fit for Arteta.

Naturally, Club Brugge are reluctant to lose their best player and are preparing for a major negotiation. According to reports from Football365, Brugge anticipate an official offer very soon.

They are expected to demand a league-record fee of £35 million to sanction the sale. Tzolis has already indicated that his absolute preference is to join Arsenal.

Comparing the profiles: Trossard vs Tzolis

A tactical comparison between Trossard and Tzolis reveals a significant shift in Arteta's attacking philosophy. Trossard is a technical, low-tempo controller who prefers short combinations.

He operates like an interior playmaker, slowing down the game to wait for underlapping runs. This style can stifle quick transitions.

Tzolis offers a completely different physical profile. He is an explosive, high-volume shooter who thrives in vertical transition.

In the 2025/26 season, Tzolis averaged 4.2 shots per 90 minutes, compared to Trossard's 2.3. He also completed 3.1 successful dribbles per 90, whereas Trossard managed only 1.2.

Tzolis's shot map shows a high concentration of efforts from the left half-space, cutting in onto his stronger right foot. However, he also maintains width, delivering 4.6 crosses per 90.

This difference in profile is exactly what Arsenal's left flank requires. With Gabriel Martinelli often isolated, Tzolis provides a direct goal threat who can stretch opposing defenses.

He forces full-backs into deep retreats, creating space for Arsenal's midfielders. The Greek international is built for the physical demands of Arteta's counter-press.

His defensive contribution is also superior, registering 2.8 recoveries in the final third per 90 last season. Trossard averaged only 1.1 in the same metric.

The £366 million rebuild takes shape

The pursuit of Tzolis is not an isolated transfer. Arsenal are pushing ahead with an ambitious £366 million quadruple transfer plan.

As detailed by reports from TeamTalk, this plan aims to revamp the entire attacking and midfield departments. The target list includes Bruno Guimarães, Morgan Rogers, Julian Álvarez, and Tzolis.

This aggressive recruitment strategy shows that Arsenal are not resting on their recent success. Having won the league, the coaching staff knows the squad must evolve to remain competitive.

Their current summer business already includes the additions of Piero Hincapié and Illan Meslier. These signings reinforce the defensive block, allowing the front office to focus on the attack.

Hincapié, signed from Bayer Leverkusen, brings a versatile left-sided defensive profile that can play both as a center-back and a defensive left-back. This tactical flexibility allows Arteta to deploy a more adventurous winger like Tzolis on the left flank.

Funding a quadruple deal of this scale requires substantial outgoings. Selling Trossard for £17 million is the first domino to fall.

It clears his wages and registers as a pure profit on the club's financial accounts. Additional player sales will follow as Arsenal look to balance their books before the window closes.

A necessary tactical evolution

Some observers might view the sale of Trossard as a risky move. Former Arsenal defender Martin Keown warned that the club must sign a very special winger to replace the Belgian.

Indeed, replacing a player who scored so many clutch goals is a difficult task. But elite teams must evolve before they begin to stagnate.

Arsenal's reliance on Trossard's late-game goals was a symptom of a deeper tactical issue. They lacked the physical capacity to break down low blocks without resorting to crosses.

Tzolis, with his superior speed and ball-carrying ability, offers a more sustainable solution. He can break defensive lines through direct dribbling rather than waiting for a mistake.

The numbers back this tactical transition. Tzolis recorded 112 progressive carries in the Belgian Pro League last season.

Trossard, by contrast, managed only 43 in the Premier League. The Greek winger's ability to drive the ball forward changes the entire dynamics of Arsenal's left flank. It represents a modernisation of the team's attack.

Ultimately, this transfer window is about raising the team's physical ceiling. While Trossard served Arsenal brilliantly, his departure was necessary.

Bringing in Tzolis for £35 million would represent an upgrade in age, athleticism, and raw output. It is a calculated gamble, but it is one that Arsenal must make to stay on top.