 On 12 April 2019, Papastathopoulos akatumidzwa kuti UEFA Europa League kuti Team revhiki pashure achitamba basa rinokosha Arsenal kuti 2 0 kukunda Napoli ari danho rokutanga kota-fainari. Akanga ari mumwe wevatambi vana veArsenal vakasarudzwa pamwe naPetr Čech, Ainsley Maitland-Niles, naAaron Ramsey. Musi wa 24 Kubvumbi 2019, Papastathopoulos akarova chibodzwa chake chekutanga muChirungu Premier League kuburikidza nemusoro wepedyo kubva pakona yekona, asi Arsenal yakadonha kukundwa ne1 3 vachipesana neWolverhampton Wanderers. Musi wa 29 Chivabvu 2019, akatanga mu2019 UEFA Europa League FinalneChelsea iyo Arsenal yakarasikirwa nayo 41. Iyi ndiyo yaive nguva yekutanga Arsenal kubvuma zvibodzwa zvina mumutambo weEuropean kubva pakurasikirwa ne5-1 neBayern Munich munaKurume 2017. 