Welcome to the final edition of the Transfer DealSheet for the 2026 summer window. Here, we are reviewing the window and looking forward to January and next summer.The information in this article has been gathered in line with The Athletic’s sourcing guidelines. Unless stated, our reporters have spoken to more than one person briefed on each mooted deal before offering the clubs involved the opportunity to comment. Those responses, when they were given, have been included. Sources were granted anonymity to protect their positions.We aim to bring you analysis you can trust on what is happening at Europe’s leading clubs and the latest information we’re hearing from across the market.This article is long but detailed, so enjoy it all — or search for the team or player you want to read about.ArsenalWas this window a success or a failure?Arsenal’s window has ended with a fair amount of disappointment due to the inability to secure a marquee attacking signing, but they have strengthened in other areas. Let’s go for ‘success’ but with room for improvement.The arrivals of Bruno Guimaraes and Ezri Konsa help with the desire to be dominant domestically. Mikel Arteta also hoped to add more individual quality up front, but will have to make do with Christos Tzolis as his only attacking signing.Failing to land attacking targets — Morgan Rogers, Bradley Barcola, Vinicius Junior, Malick Fofana, Julian Alvarez — will frustrate fans.Vinicius Junior signed a new deal at Madrid (David Balogh/Getty Images)If Arsenal’s style of play remains, there may be questions over whether the correct positions were prioritised. The club may argue that suitable attacking players were not available for the right price.How much did they spend and how much did they bring in?Arsenal’s £198.5million ($267.7m) expenditure was around £60m less than last year, albeit on five signings compared to eight. There was an emphasis on filling out the squad last summer, whereas the focus this year has been on making tweaks to lift the ceiling of an elite squad.They recognised there was a need to sell as the window progressed, with late sales of Gabriel Martinelli (set to join Al Hilal), Gabriel Jesus and Fabio Vieira resulting in them receiving more money (£122.5m) than any previous summer.Martinelli is set to move to Saudi Arabia (Stuart MacFarlane/Arsenal FC via Getty Images)The ties Arsenal have to Martinelli, Jesus and Leandro Trossard made for emotional departures, but each was necessary given their contract situations. Arsenal could not let valuable players leave on free transfers when their deals expired next summer, as has often happened in the past.Jakub Kiwior‘s move to Porto was similar to Piero Hincapie’s to Arsenal, as the Portuguese club activated an option to buy. Christian Norgaard and Karl Hein were surplus to requirements. Reiss Nelson had his contract terminated by mutual consent after 18 years at the club.The main motivation of Ethan Nwaneri’s loan to Borussia Dortmund is to give the 19-year-old game time at a high level rather than potential financial gains.Who have they signed?He’s not a new face, but Hincapie was the first official permanent move, with Arsenal activating an option from his loan for around £40m. Illan Meslier’s arrival on a free transfer was another low-key addition, although his pre-season performances did provide promise that he could be an upgrade on Kepa Arrizabalaga.Tzolis was the first proper first-team signing, for £34m from Club Brugge. The 24-year-old hit the ground running in pre-season and has carried that momentum into the opening weeks of the season. Guimaraes’ protracted move from Newcastle United was finalised before the Community Shield and he has looked impressive in his two competitive appearances, while Konsa saw out an important 1-0 win on debut away to his former employers, Aston Villa.Tzolis arrived from Brugge (Alex Caparros/Getty Images)The outgoings were: Hein (£2.6m), Kiwior (£18.9m), Trossard (£17m), Norgaard (£7m), Vieira (£8.5m), Jesus (£8.5m) and Nelson (free). Martinelli is also expected to join Al Hilal for £60m.What will their priority be in January?They did not want to reach the asking price for either Rogers or Barcola, but if they move for an attacker in January, they may end up paying a premium anyway. Julian Alvarez’s heart was set on Barcelona, while Eli Junior Kroupi is out for another two to three months after foot surgery in July.Tzolis’ arrival refreshes the left wing, but the front line is still the area in most need of reinforcement.Their other summer signings addressed specific issues. Konsa was pursued after William Saliba’s back injury at the World Cup, and Guimaraes was seen as a midfielder who could take the squad to another level.Will they have money to spend?They received €90million (£77m; $104m) for three players on deadline day. Trossard, Martinelli, Jesus and Nelson were also on high wages.Freeing up that space could be beneficial should they dip back into the market in January.While having a better net spend and more wage space than this time last year, differences in UEFA squad cost rules (SCR) may require them to be smart about how they bring any new additions into the club in January.January windows tend to be quiet at Arsenal — there have been no new arrivals in the last three winter windows. Trossard, Kiwior and Jorginho were all signed in January 2023.ChelseaWas this window a success or a failure?A success, with Chelsea’s squad stronger. Emiliano Martinez is an upgrade on Robert Sanchez and can mentor long-term prospect Mike Penders too.Maxence Lacroix is one of the ‘ready-made’ acquisitions and has settled quickly in central defence. Chelsea broke the record for a British player by buying Morgan Rogers from Aston Villa. It is early days, but with the manner in which he is combining with Cole Palmer and Joao Pedro, Chelsea have one of the best attacks in the division.The club have often been accused of lacking leaders and experience. Along with Martinez, this has been addressed with the acquisitions of Jordan Henderson and Danny Welbeck. Emmanuel Emegha and Welbeck provide backup for Joao Pedro, but the Brazilian is crucial to the way they play.There are questions over the strength of depth in midfield. But with Marco Palestra from Atalanta bought to operate primarily as a right wing-back, captain Reece James is seen as the player to fill the spot vacated by Enzo Fernandez. Valentin Barco and Henderson have been added to the mix, along with Moises Caicedo and Romeo Lavia.Barco adds to the midfield options (Richard Pelham/Getty Images)Chelsea have also retained their crown as the highest sellers in the Premier League. Fernandez made it clear he wanted to leave, but they got a joint-highest Premier League fee of £125m from Manchester City. Making a profit on an individual signed for £106m is good going.Fernandez is one of more than 20 departures. Apart from a few of the young loanees, they have not lost anyone they wanted to keep. Marc Cucurella and Fernandez have been important, but Chelsea wanted to move on from players who had close ties to former head coach Enzo Maresca.Not all of the unwanted individuals went permanently, with loans being settled for instead. It obviously raises the prospect of having to deal with them again next summer too.