Arsenal released Yaya Sanogo, Stefan O'Connor, Kostas Pilea and Kristopher Da Graca on 9 June 2017. Sanogo's four-year stay only included 11 league appearances for the club, while O'Connor, Pilea and Da Graca never appeared for the first team. Academy product Chris Willock joined Benfica on June 30 upon the expiry of his contract, signing a five-year deal. Kaylen Hinds, another academy product, departed the club on 8 July, joining Wolfsburg for £2.5 million on a three-year deal. Additional reserve players Glen Kamara and Daniel Crowley also departed the club, joining Dundee and Willem II respectively. Wojciech Szczęsny, who amassed over 150 appearances for the club during an eight-year stay, joined Italian champions Juventus for £10.0 million after his two-year loan at Roma expired. Meanwhile, club mainstay Kieran Gibbs departed for West Bromwich Albion for a £7.0 million fee, leaving after recording 230 appearances over 11 seasons. On deadline day, Alex Oxlade-Chamberlain, who was in the final year of his contract at the club, transferred to Liverpool for a record sale fee of £35.0 million and Donyell Malen returned to the Netherlands to join PSV Eindhoven. In the January window, Arsenal allowed the departures of many first-team players, including Theo Walcott and Francis Coquelin, who left for combined fees of £32.0 million. Moreover, Alexis Sánchez departed to Manchester United in a swap-deal which saw Henrikh Mkhitaryan arrive at the Emirates, while also sanctioning the departures of French first-team pair Olivier Giroud and Mathieu Debuchy, while academy product Marcus McGuane joined Barcelona. All in all, 22 players departed the club.